Free SMS Service

Electronic cigarette is more durable

2009-10-11T00:18:00.000-07:00

Are you a smoker? When you're taking a cigarette for the first time? Smoking is one of the many products consumed by the public. When you know that the cigarettes contain harmful substances, but a lot of cigarettes benefits for people who already consume cigarettes. Among them, smoking can relieve stress, help feeling sleepy and remove the smell of strong-smelling foods. However, most people think cigarettes are harmful to health. Besides can disrupt the function of your lungs, smoking also creates a sense of opium. Besides dangerous for his customers, cigarette smoke is also very dangerous for him to breathe. After all cigarettes became a valuable item for every person who is consuming cigarettes.

Cigarettes you may be used to consume to burn the end of the first. New you can suck it after the fire burning. However, if you are one subscription to the online store, then you must know the latest discoveries from your frequent cigarette consumption. Cigarettes can be found in the online shop in the form of e cigarette that does not suck to be burned before it. In addition, cigarette electronic devices need to be used. This would seem more durable because when the e cigarette battery you're out you can fill in the e cigarette batteries you can buy in the shop online. If you want to buy an electronic cigarette then you will get a starter kit Bundles for your smoking needs. This will be more efficient if you switch to e cigarette.

Credit and debt consolidation

2009-07-25T20:16:00.000-07:00

The debts by credit card occurs when a client of a company by credit card buys an item or service by the card system. The result will lead to many problems. The results of not paying this debt on time are that the company will charge a penalty for late payment. Some companies by credit card make it harder to cancel debts by credit card. When a consumer has been late on a payment, it increases interest rates that consumers pay. So before you enter the problems like this, must ensure that you pay your money on time. If debts are still increasing, you will be severely occupied. The disadvantages of the credit card debt are high administrative costs, you need more working capital operating there have a risk of bankruptcy and bad debt. These drawbacks affect other conditions in the financial position, the longevity of the product, length of the manufacturing process, competition and competitors credit conditions, the position of economic conditions on financial institutions, the discount for payment earlier, the type of debtor's business and financial position. To get this problem you must ensure you get the credit consolidation and debt consolidation of credit. 3debtconsolidation.com is a Web site, regardless of which offers consumers free credit and debt continued advising services and educational materials if consumers are in the program management plan debt DCC. The DCC also provides free educational lectures to the public. The website contains many articles of consolidating debt. 3debtconsolidation.com Credit Counseling Corp.. east of 501 (c) (3) educational service nonprofit dedicated to providing consumer education and financial resources they need. Their goal is to provide information to consumers not only on specific fields but also to provide a service catalog that can meet your needs if they are not able to help. It also contains debt counseling section of questions and answers where you can ask all the credit and debt issues. These options will be very useful for those who are new to the world of debt.

Valentine MP3 2009 Download

2009-02-10T14:48:00.000-08:00

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I Love you Just the Way you Are by Billy Joel
I Saw Her Standing There
I Swear by John Micheal Montgomery
I Think I Love You by Partridge Family
I Wanna Be With You by Fun Factory
I Want To Know What Love Is by Foreigner
Endless Love by Mariah Carey and Luther Vandross
Every Breath You Take by Sting The Police
Everything I Do I Do It For You by Bryan Adams
Everything You Want by Vertical Horizon
Forever And Ever Amen by Randy Travis
Hanging By A Moment by Lifehouse
Have I Told You Lately That I Love You by Rod Stewart
Head Over Feet Alanis Morissette
Heard it in a Love Song by Marshall Tucker Band
How You Remind Me by Nickelback
I Can Love You Like That by John Michael Montgomery
I Fall To Pieces by Patsy Cline
Do You Love Me
Dont Forget About Us by Mariah Carey
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Do Wah Diddy Diddy by Manfred Mann
Earth Angel
I Just Want To Be Your Everything by Andy Gibb
I Love You by Sarah Mclachlan
I Will Do Anything For Love But I Wont Do That by Meatloaf
Im a Believer by The Monkees
In The Mood by Glenn Miller
In Your Eyes by Peter Gabriel
Iris by The Goo Goo Dolls
Isnt It Romantic by Rod Stewart
Ive Got A Brand New Pair Of Roller Skates You Got A Brand New Key by Melanie
I ve Had the Time of my Life by Dirty Dancing
Just The Way You Are by Billy Joel
Kiss Me by Sixpence None The Richer
Lets Make Love by Faith Hill Tim McGraw
Love And Marriage by Frank Sinatra
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My Girl by The Temptations
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My Valentine by Martina Mcbride
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Nothing Compares To You by Sinead O Connor
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Say Say Say by Paul Mcartney and Michael Jackson
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Choose the Right Optical Store to Buy the Right Prescription Eyeglasses

2009-02-07T05:07:00.000-08:00

Nowadays, living expenses are increasing. You might also notice that all prices are significantly increasing causing people to be more selective in spending their money. It commonly happens now that people will consider many things before they buy things they consider secondary such as eyeglasses. You might find that prices of eyeglasses especially the prescribed ones can be expensive nowadays.

If you need to buy prescription eyeglasses, you can try to get the affordable one at the right store. As you can see at nytimes.com, there are ways to save more money on prescription eyeglasses. The article at this website shows you nine ways on reducing the prices of your prescription eyeglasses. One important thing you must notice is the fact that Zenni Optical in the New York Times?! This online store is famous since it sells prescription eyeglasses for only $8! Though the lenses might be generic, but within well maintenance, you will find that these eyeglasses can be long lasting and this means that you can absolutely save more money on eyeglasses.

In conclusion, you can absolutely be seeing straight without breaking bank by choosing the right store that can give you affordable eyeglasses at the finest quality. In this case, Zenni Optical might be the best choice.

Free Download New Year 2009 Wallpapers

2008-12-27T07:54:00.000-08:00

Best Wallpapers for you. Free Download New Year 2009 Wallpapers.

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Download High Definition Movie (HDTV - 1080p)

2008-12-20T01:15:00.000-08:00

Do you know HDTV ?

High-definition television (HDTV) is a digital television broadcasting system with higher resolution than traditional television systems (standard-definition TV, or SDTV). HDTV is digitally broadcast; the earliest implementations used analog broadcasting, but today digital television (DTV) signals are used, requiring less bandwidth due to digital video compression. (wikipedia)

This is an example:

Boarding Gate Movie
You can download here: Movie HDTV

The Easy Way to Get FREE Internet TV Channels On Your PC

2008-09-08T23:20:00.000-07:00

With the power of the Internet, you crapper today access the contents of the World Wide Web, which nowadays are same boundless stream of data and information. If you poverty to start a business and you requirement help, you don’t requirement to go anywhere for help. You’ll meet hit to seat down bound and with a little browsing in the Internet, you crapper encounter a detailed pass that would help you. Even going to school crapper be done online, mp3’s and almost every types of files are already downloadable in the Internet.

What else you could do? Well, you guessed it. You crapper today check TV channels online. Some raise their pc’s to be able to check TV on their pc and with an LCD monitor, you crapper rattling check TV in high-definition color and do your work at the aforementioned instance but if you hit a good internet connection, why waste a aggregation of money on raise patch you crapper check the shows online?

What you requirement if you poverty to check TV online:

First and the most important thing to consider is that you staleness a hit a fast cyberspace connection. There are no real specifications on the exact speed for the buffering module also be based on the provider but you staleness hit at least 1mb unification to hit a goodish buffer speed.

Second is that you staleness know how to look for cyberspace TV channels. There are generally three types that you crapper encounter in the Internet. There are sites that module substance you to check TV channels for free. It is good to hit the articulate “free” but most of these sites are so slow that your fast cyberspace unification module looks same dial-up. Some even let you sign-up something before you crapper start watching and be certain if it lets you download some files. This haw include viruses that crapper harm your pc. The second type is the place that let you check TV shows with a price. It is a one-time registration fee and you could check unlimited TV shows with an acceptable speed. But if you’re looking to high speed buffering. You crapper opts to opt a place that gives a fee for every channel you watch. Well, the choice is yours to make.

Lastly, you staleness hit every the necessary codecs and players installed so that your pc crapper play the shows correctly. Don’t worry, there are an aggregation of free downloadable players and codecs and if you hit a missing codec it would automatically communicate you if you poverty to download one and meet click yes.

Most require a limited contestant to be installed in your system before you crapper start watching. Mostly it module require you to hit windows media contestant and real contestant installed. Windows media contestant is already included in standard windows installation. For real player, there are free versions available in the internet for download.

Here are some of the channels you crapper check online:

ABC Sports News
Hit Channel
Ireland Live
NASA TV at nasa.gov
Popp Tivi
Raisport
RTLZ
Video Music Network
Viva WOM
VPRO
VPRO Theme Channel
MTV Malaysia
Nation 217
book TV
MTV UK
3 BTV
E-Music Televisions
Classic FM TV
RED TV
Hit Channels
Western Bonanzas TV
GnF Movie Channel
Nickelodeon
Reelgood TV
Western Bonanza TV
NBC Los Angeles
MMC TV
MCM Top France
Islam Channel
Beat.one
Pulse 24

Download Game Age of Empires III for Mobile Phone

2008-08-16T08:09:00.000-07:00

This mobile game focuses on its strategic thinking and decision-making capacity in situations where it is almost in a situation. In most cases, our heroes have never had the opportunity to have their food served to them on a plate of gold with grapes or strawberries around like shakes and soft drinks in this game you have to walk in their shoes and make sure you keep intact the history Nokia through their keys and screen. It's all about honor, personal pride and his will to succeed which will decide who is standing when the dust settles.

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Download: Camino 1.6

2008-04-24T04:05:00.000-07:00

The best browser for Mac, Camino, has become even better with the release of Camino 1.6.

Camino 1.6 is available now, and is free and open source.

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I Love your Smile - Romantic SMS

2008-04-05T17:32:00.000-07:00

When it hurts to look back and you are scared to look ahead look beside you I'll always be there 4 you.
(Characters: 103)

Little keys can open big locks, simple words can express great thoughts. A text from u never fails to make me smile the whole day through.
(Characters: 138)

Hearts could only luv 4 a while u can put many relations in a file, u can make a desert from the Nile, but u can’t stop my smile when I c ur name on my phone.
(Characters: 158)

Sending SMS Messages from a Computer / PC Using AT Commands (AT+CMGS, AT+CMSS) (Tutorial 25)

2008-04-05T17:24:00.000-07:00

Either of the AT commands +CMGS (command name in text: Send Message) and +CMSS (command name in text: Send Message from Storage) can be used to send SMS messages from a computer / PC. The key difference between them is that the +CMGS AT command takes the SMS message to be sent as a parameter, while the +CMSS AT command takes the index number that specifies the location of the SMS message in the message storage area as a parameter. Following is an example for illustrating the difference. Suppose you want to send the text message "Sending text messages is easy." from a computer / PC to the mobile phone number 91234567 using the +CMGS AT command in SMS text mode. Here is the command line to be used:

AT+CMGS="91234567"Sending text messages is easy.

To send the same text message using the +CMSS AT command, first you have to use the AT command +CMGW (command name in text: Write Message to Memory) to write the text message to the message storage area. In SMS text mode, the command line should be:

AT+CMGW="91234567"Sending text messages is easy.

Let's say the SMS text message is now located at index 3 of the message storage area. You can use the +CMSS AT command to send the text message to the message center by the following command line:

AT+CMSS=3

As storage space is limited, if every SMS text message sent is left in the message storage area, there will come a time when no more SMS text messages can be written. To free some storage space, you can use the AT command +CMGD (command name in text: Delete Message) to delete the SMS text message from the message storage area, like this:

AT+CMGD=3

As you can see above, sending an SMS message by the +CMSS AT command is a bit cumbersome, since it involves more steps and AT commands. However, a copy of the sent SMS message can be saved in the message storage area. This is not achievable with the +CMGS AT command.

In some situations, it is more convenient to send SMS messages by the +CMSS AT command than the +CMGS AT command. For example, if you have to send the same SMS message to multiple recipients, using the +CMSS AT command is more convenient:

AT+CMSS=3,"91234567"

AT+CMSS=3,"97777777"

AT+CMSS=3,"96666666"

...

Note: To keep things simple in the above examples, we assume that the same message storage area is used by the AT commands +CMSS, +CMGW, +CMGD and for receiving SMS messages. But this may not be true in real situations. To learn how to set the message storage areas to be used by different SMS operations, please refer to the earlier section "Preferred Message Storage (AT+CPMS)" of this SMS tutorial.

25.1. Comparison Table of the AT Commands +CMGS and +CMSS

The comparison table below summarizes the differences between the AT commands +CMGS and +CMSS that are discussed in the previous section.

	+CMGS AT command	+CMSS AT command
Parameters	+CMGS takes the SMS message to be sent as a parameter.	+CMSS takes the index number that specifies the location of the SMS message in the message storage area as a parameter.
Sending new SMS messages	Using +CMGS is more convenient. +CMGS can be used to send new SMS messages without the help of other AT commands. However, no copy of the SMS message sent is saved in the message storage area.	+CMSS has to be used together with +CMGW and +CMGD for sending new SMS messages. As a result, the process involves more steps and is a bit cumbersome. However, a copy of the SMS message sent can be saved in the message storage area.
Sending the same SMS message to multiple recipients	Using +CMGS is less convenient.	Using +CMSS is more convenient.

+CMGS AT command

+CMSS AT command

Parameters

+CMGS takes the SMS message to be sent as a parameter.

+CMSS takes the index number that specifies the location of the SMS message in the message storage area as a parameter.

Sending new SMS messages

Using +CMGS is more convenient. +CMGS can be used to send new SMS messages without the help of other AT commands.

However, no copy of the SMS message sent is saved in the message storage area.

+CMSS has to be used together with +CMGW and +CMGD for sending new SMS messages. As a result, the process involves more steps and is a bit cumbersome.

However, a copy of the SMS message sent can be saved in the message storage area.

Sending the same SMS message to multiple recipients

Using +CMGS is less convenient.

Using +CMSS is more convenient.

from developershome .com

Deleting SMS Messages from Message Storage (AT+CMGD) (Tutorial 24)

2008-03-25T17:08:00.000-07:00

The AT command +CMGD (command name in text: Delete Message) is used to delete SMS message(s) from message storage. The message storage area from which SMS messages are deleted is specified by the +CPMS AT command (command name in text: Preferred Message Storage). Details about the +CPMS AT command can be found in the earlier section "Preferred Message Storage (AT+CPMS)" of this SMS tutorial.

1. Syntax of the +CMGD AT Command

The syntax of the +CMGD AT command is: (Optional parameters are enclosed in square brackets.)

+CMGD=index[,flag]

In the above line, index is an integer specifying the location of the SMS message to be deleted from the message storage area by the +CMGD AT command, and flag is an integer specifying whether to delete SMS messages according to their message status. The SMS specification has defined these flag values: 0, 1, 2, 3 and 4.

0. Meaning: Delete only the SMS message stored at the location index from the message storage area. This is the default value.
1. Meaning: Ignore the value of index and delete all SMS messages whose status is "received read" from the message storage area.
2. Meaning: Ignore the value of index and delete all SMS messages whose status is "received read" or "stored sent" from the message storage area.
3. Meaning: Ignore the value of index and delete all SMS messages whose status is "received read", "stored unsent" or "stored sent" from the message storage area.
4. Meaning: Ignore the value of index and delete all SMS messages from the message storage area.

To find the flag values supported by your GSM/GPRS modem or mobile phone, you can perform a test operation using the +CMGD AT command. See the next section for the details.

2. Finding the Supported Indexes and Flag Values

Performing a test operation with the +CMGD AT command allows you to find all indexes that are supported by the index parameter. The test operation may also return all supported values of the flag parameter. Here is the format of the information response returned after the execution of the test command "+CMGD=?": (Optional fields are enclosed in square brackets.)

+CMGD: (list_of_indexes)[,(list_of_flag_values)]

The values inside the first parentheses are the values that are supported by the index parameter of the +CMGD AT command.
The values inside the second parentheses are the values that are supported by the flag parameter of the +CMGD AT command. Note: A GSM/GPRS modem or mobile phone might not provide these values since the SMS specification defines them as optional.

As an example, here is the response returned from my Nokia 6021 mobile phone to Windows' HyperTerminal program after the execution of the test command "+CMGD=?":

AT+CMGD=?
+CMGD: (1-10),(0-4)

OK

From above, we know that the Nokia 6021 mobile phone allows any integer between 1 and 10 to be assigned to the index parameter of the +CMGD AT command. Also, the Nokia 6021 mobile phone supports all of the five flag values defined in the SMS specification.

Do you remember that we described the format of values inside parentheses in the section "Test Command -- Checks Whether a Certain AT Command is Supported"? If not, you may want to go back and have a look. Here are a few examples showing some of the possibilities: "(0-4)", "(0,1,2,3,4)", "(0,2-4)".

3. Example Demonstrating How to Use the +CMGD AT Command to Delete SMS Text Messages

Now let's see an example that demonstrates how to use the +CMGD AT command to delete an SMS text message from the message storage area. Suppose you have written an SMS text message to the message storage area by the +CMGW AT command (details about the +CMGW AT command can be found in the earlier section "Writing SMS Messages to Memory / Message Storage (AT+CMGW)" of this SMS tutorial), like this:

AT+CMGW="+85291234567"
> A simple demo of SMS text messaging.
+CMGW: 1

OK

The information response of the +CMGW AT command tells us that the SMS text message is stored in the memory location at index 1. To delete the SMS text message, specify 1 to the index parameter of the +CMGD AT command, like this:

(Important note: Make sure you are writing text messages to and deleting text messages from the same message storage area. If not, you may delete the wrong text message. Details about message storage areas can be found in the earlier section "Preferred Message Storage (AT+CPMS)" of this SMS tutorial.)

AT+CMGD=1
OK

The final result code OK indicates the SMS text message "A simple demo of SMS text messaging." was deleted successfully. If the operation fails, the final result code returned will either be ERROR or +CMS ERROR.

Here is another example. Suppose you want to delete all SMS messages stored in the message storage area. To do this, assign 4 to the flags parameter of the +CMGD AT command. The value assigned to the index parameter does not matter since it will be ignored by the GSM/GPRS modem or mobile phone.

AT+CMGD=1,4
OK

from developershome .com

a Snowman, fall in love, beautiful rose - Romantic SMS

2008-03-21T06:58:00.000-07:00

If I were to describe true luv then I would describe it as what a snowman did to a snowwoman:
He gave her warm hug n they both melted in each other’s arms.
(Characters: 155)

Never waste an opportunity 2 say 'I love U' to someone u really like,
coz it is not everyday u'll meet the person
who has the magic to let u fall in love.
(Characters: 154)

I looked at a sweet, beautiful rose,
and then I looked at you,
and I kept looking at you,
for the rose isn't as beautiful as you. 2
(Characters: 131)

Writing SMS Messages to Memory / Message Storage (AT+CMGW) (Tutorial 23)

2008-03-21T06:46:00.000-07:00

The AT command +CMGW (command name in text: Write Message to Memory) is used to write an SMS message to memory (i.e. message storage). The memory/message storage area to which SMS messages are written is specified by the +CPMS AT command (command line in text: Preferred Message Storage). Details about the +CPMS AT command can be found in the earlier section "Preferred Message Storage (AT+CPMS)" of this SMS tutorial.

Syntax of the +CMGW AT Command in SMS Text Mode

In SMS text mode, the syntax of the +CMGW AT command is: (Optional parameters are enclosed in square brackets.)

+CMGW[=address[,address_type[,message_status]]]sms_message_body

Before we discuss each of the parameters, let's see an example that gives you some idea of how an actual command line should look like:

AT+CMGW="+85291234567",145,"STO UNSENT"This is an example for illustrating the syntax of the +CMGW AT command in SMS text mode.

The address Parameter

The first parameter of the +CMGW AT command, address, specifies the destination address to send the SMS message to. Usually it is a mobile number formatted using the typical ISDN / telephony numbering plan (ITU E.164/E.163). For example, "+85291234567" and "91234567". Note that the value passed to the address parameter should be a string, i.e. it should be enclosed in double quotes.

The address parameter is optional and so it can be omitted. Later when you want to send the SMS message out, you can specify the destination address by the +CMSS AT command (command name in text: Send Message from Storage).

The address_type Parameter

The second parameter of the +CMGW AT command, address_type, specifies the type of the address assigned to the address parameter. Two values are commonly used. They are 129 and 145:

129. Meaning: The value of address is formatted using the typical ISDN / telephony numbering plan (ITU E.164/E.163) but it is not sure whether the value of address is an international number, a national number or a number of other types. Example addresses: "85291234567", "91234567".
145. Meaning: The value of address is formatted using the typical ISDN / telephony numbering plan (ITU E.164/E.163) and it is an international number. Example address: "+85291234567".

As address_type is an optional parameter, it can be omitted. If you do so, the GSM/GPRS modem or mobile phone will use the default value of the address_type parameter, which is:

129 if the value of address does not start with a "+" character. For example, "85291234567".
145 if the value of address starts with a "+" character. For example, "+85291234567".

The message_status Parameter

The third parameter of the +CMGW AT command, message_status, specifies the status of the SMS message to be written. The SMS specification has defined four status values:

REC UNREAD. It refers to the message status "received unread".
REC READ. It refers to the message status "received read".
STO UNSENT. It refers to the message status "stored unsent". This is the default value.
STO SENT. It refers to the message status "stored sent".

Note that the value assigned to the message_status parameter should be a string. Thus, it should be enclosed in double quotes.

As message_status is an optional parameter, it can be omitted. If you do so, the GSM/GPRS modem or mobile phone will use the default value of the message_status parameter, which is "STO UNSENT".

The Character

, which represents the carriage return character, follows the message_status parameter. When the GSM/GPRS modem or mobile phone receives the carriage return character, it will send back a prompt formed by these four characters: the carriage return character, the linefeed character, the ">" character and the space character. If you don't understand what this means, don't worry. This should be clear to you when you see the example in the section "Example Demonstrating How to Use the +CMGW AT Command to Write SMS Text Messages to Message Storage in SMS Text Mode".

The sms_message_body Parameter

The fourth parameter of the +CMGW AT command, sms_message_body, specifies the SMS message body to be written to the memory/message storage area. Entering the character will cancel the +CMGW AT command. If you don't understand what this means, see the example in the section "Example Demonstrating How to Use the +CMGW AT Command to Write SMS Text Messages to Message Storage in SMS Text Mode".

The Character

When you finish entering the SMS message body, you have to enter the character to mark the end of the SMS message body. The GSM/GPRS modem or mobile phone will then attempt to write the SMS message to the memory/message storage area.

SMSC Number Stored with the SMS Message (SMS Text Mode)

In SMS text mode, the +CMGW AT command does not have a parameter that allows you to specify an SMSC number. (Note that the +CMGW AT command does have such parameter when the GSM/GPRS modem or mobile phone is operating in SMS PDU mode.) However, when an SMS message is written to message storage, an SMSC number is actually stored with it. The SMSC number stored is the one specified by the +CSCA AT command (command name in text: Service Centre Address). Later if you send the SMS message, it will be transmitted through this SMSC. Once an SMS message has been written to message storage, it is not possible to change the SMSC number stored with the SMS message by using AT commands.

Note that it is possible that the command behavior on your mobile device is slightly different from what was described above.

More information about this issue is available in the "SMSC Number to be Used by the +CMSS AT Command to Send SMS Messages" section of this SMS tutorial.

Format of the Information Response of the +CMGW AT Command in SMS Text Mode

If the GSM/GPRS modem or mobile phone writes the SMS message to the message storage area successfully, it will return an information response to the computer / PC. In SMS text mode, the information response of the +CMGW AT command has the following format:

+CMGW: index

index is an integer that tells us the memory location to which the SMS message was written in the message storage area.

from developershome .com

I'll always be there 4 you - Romantic SMS

2008-03-14T20:18:00.000-07:00

When it hurts to look back and you are scared to look ahead look beside
you I'll always be there 4 you.
(Characters: 103)

Little keys can open big locks, simple words can express great thoughts.
A text from u never fails to make me smile the whole day through.
(Characters: 138)

Hearts could only luv 4 a while u can put many relations in a file,
u can make a desert from the Nile,
but u can’t stop my smile when I c ur name on my phone.
(Characters: 158)

Preferred Message Storage (AT+CPMS) (Tutorial 22)

2008-03-14T20:07:00.000-07:00

The AT command +CPMS (command name in text: Preferred Message Storage) serves several purposes. It can be used to:

1. Select the message storage area that will be used when sending, receiving, reading, writing or deleting SMS messages.

2. Find the number of messages that are currently stored in the message storage area.

3. Find the maximum number of messages that can be stored in the message storage area.

Selecting the Message Storage Areas to be Used for SMS Reading, Writing, Deleting, Sending or Receiving

To select the message storage areas to be used for SMS reading, writing, deleting, sending or receiving, you should perform a set operation with the +CPMS AT command. The syntax is: (Optional parameters are enclosed in square brackets.)

+CPMS=message_storage1[,message_storage2[,message_storage3]]

Before we discuss each of the parameters, let's see an example that gives you some idea of how an actual command line should look like:

AT+CPMS="ME","SM","MT"

The message_storage1 Parameter

The first parameter of the +CPMS AT command, message_storage1, specifies the message storage area that will be used when reading or deleting SMS messages. (For details about reading SMS messages, see AT commands +CMGR and +CMGL. For details about deleting SMS messages, see the AT command +CMGD.)

The message_storage2 Parameter

The second parameter of the +CPMS AT command, message_storage2, specifies the message storage area that will be used when sending SMS messages from message storage or writing SMS messages. (For details about sending SMS messages from message storage, see the AT command +CMSS. For details about writing SMS messages, see the AT command +CMGW.)

The message_storage3 Parameter

The third parameter of the +CPMS AT command, message_storage3, specifies the preferred message storage area for storing newly received SMS messages. If you use the +CNMI AT command (command name in text: New Message Indications to TE) to tell the GSM/GPRS modem or mobile phone to forward newly received SMS messages directly to the PC instead of storing them in the message storage area, you do not need to care about the message_storage3 parameter.

Values that May be Assigned to the Parameters of the +CPMS AT Command

Here are the values defined in the SMS specification that may be assigned to the parameters message_storage1, message_storage2 and message_storage3:

SM. It refers to the message storage area on the SIM card.
ME. It refers to the message storage area on the GSM/GPRS modem or mobile phone. Usually its storage space is larger than that of the message storage area on the SIM card.
MT. It refers to all message storage areas associated with the GSM/GPRS modem or mobile phone. For example, suppose a mobile phone can access two message storage areas: "SM" and "ME". The "MT" message storage area refers to the "SM" message storage area and the "ME" message storage area combined together.
BM. It refers to the broadcast message storage area. It is used to store cell broadcast messages.
SR. It refers to the status report message storage area. It is used to store status reports.
TA. It refers to the terminal adaptor message storage area.

Note that a GSM/GPRS modem or mobile phone may not support all the above values and it may support other manufacturer specific values. To learn how to find the values supported by your GSM/GPRS modem or mobile phone, please refer to the section "Finding the Message Storage Areas Supported by a GSM/GPRS Modem or Mobile Phone".

Format of the Information Response of the +CPMS AT Command

If the GSM/GPRS modem or mobile phone executes the +CPMS set command successfully, it will return an information response to the computer / PC. The information response of the +CPMS AT command has the following format:

+CPMS: used_space1,max_space1,used_space2,max_space2,used_space3,max_space3

used_space1 is the number of messages currently stored in the message storage area specified by the message_storage1 parameter.
max_space1 is the maximum number of messages that can be stored in the message storage area specified by the message_storage1 parameter.
used_space2 is the number of messages currently stored in the message storage area specified by the message_storage2 parameter.
max_space2 is the maximum number of messages that can be stored in the message storage area specified by the message_storage2 parameter.
used_space3 is the number of messages currently stored in the message storage area specified by the message_storage3 parameter.
max_space3 is the maximum number of messages that can be stored in the message storage area specified by the message_storage3 parameter.

Finding the Message Storage Areas Supported by a GSM/GPRS Modem or Mobile Phone

Before we can use the +CPMS AT command to select the message storage areas to be used for various SMS operations, we have to know what message storage areas are supported by the GSM/GPRS modem or mobile phone. Among the six types of message storage area mentioned in the last section, "SM", "ME" and "MT" are commonly supported by GSM/GPRS modems and mobile phones. To find out the message storage areas that are supported by your GSM/GPRS modem or mobile phone, you can perform a test operation with the +CPMS AT command using the command line below:

AT+CPMS=?

If the GSM/GPRS modem or mobile phone executes the above command line successfully, it will return an information response to the computer / PC. The information response of the +CPMS AT command has the following format:

+CPMS: (storage1a,storage1b,...),(storage2a,storage2b,...),(storage3a,storage3b,...)

The first, second and third parentheses contain the values supported by the message_storage1 parameter, the message_storage2 parameter and the message_storage3 parameter respectively.

from developershome .com

Last, My Luv is True, Love - Romantic SMS

2008-03-08T16:08:00.000-08:00

I don't care how many lips u’ve kissed,
how many shoulders u’ve embraced & how many times u’ve said, I Luv U!
All I care is not be the first but to be ur last!
(Characters: 159)

Feelings are many but words are few,
clouds are dark but sky is blue;
Luv is a paper, life is glue, every thing is false, only My Luv is TRUE.
(Characters: 142)

U want & u get, that's luck, U want & u wait, that's time.
U want but u compromise, that's life.
And U want & u wait & u don't compromise that's LOVE.
(Characters: 150)

Setting or Reading the Service Center Address / SMSC Address (AT+CSCA) (Tutorial 21)

2008-03-07T16:00:00.000-08:00

Before you send SMS messages, one important thing that should be done is to make sure the correct service center address (SMSC address) has been set properly. Typically a service center address/SMSC address is a phone number formatted using the ISDN / telephony numbering plan (ITU E.164/E.163). For example, +85291234567. The AT command +CSCA (command name in text: Service Centre Address) can be used to set or read the service center address through which SMS messages are sent. The setting will be used by the AT commands +CMGW (command name in text: Write Message to Memory) and +CMGS (command name in text: Send Message).

In SMS text mode, the only way to specify the service center address to be used by +CMGW and +CMGS is through +CSCA. However, in SMS PDU mode, it is possible to specify the service center address to the AT commands +CMGW and +CMGS directly as a parameter value.

The mobile network operator usually pre-sets the correct service center number in the default profile of settings stored in the SIM card. Most mobile phones provide some ways for the user to view or change the service center number saved in the profiles of settings. For example, on my Nokia 6021 mobile phone, the message center number saved in the default profile of settings can be viewed and changed by going to Menu -> Messages -> Message settings -> Text messages -> Sending profile -> Default profile -> Message centre number.

Some GSM/GPRS modems and mobile phones (for example, Nokia 6021, Sony Ericsson T68i, Philips 598, etc) use the service center number in the default profile of settings as the default value of the +CSCA AT command. As a result, if the service center number in the default profile of settings is correct, you do not need to use the +CSCA AT command to set the service center number.

Note

To some mobile devices such as Nokia 6021, the +CSCA AT command does not save the service center number in non-volatile memory. Hence, if you switch off the GSM/GPRS modem or mobile phone, the setting will be gone. To save the service center number set with the AT command +CSCA, you have to make use of the AT command +CSAS (command name in text: Save Settings). To restore the saved service center number, the AT command +CRES (command name in text: Restore Settings) is required.

The command behavior is different on some mobile devices such as Sony Ericsson T68i and Philips 598. Every time the AT command +CSCA is used to change the SMSC address, the new SMSC address is saved to non-volatile memory.

21.1. Syntax of the +CSCA AT Command

21.1.1. Setting the Service Center Address

To set the service center address, perform a set operation with the +CSCA AT command using the following syntax: (Optional parameters are enclosed in square brackets.)

+CSCA=address[,address_type]

The address Parameter

The first parameter of the +CSCA AT command, address, specifies the SMSC address to be set. Usually it is a phone number formatted using the typical ISDN / telephony numbering plan (ITU E.164/E.163). For example, "+85291234567". Note that the value assigned to the address parameter should be a string, which means you should use double quotes to enclose the phone number.

The address_type Parameter

The second parameter of the +CSCA AT command, address_type, specifies the type of the SMSC address assigned to the address parameter. Two values, 129 and 145, are commonly used.

129. Meaning: The SMSC address is formatted using the typical ISDN / telephony numbering plan (ITU E.164/E.163) but it is not sure whether the SMSC address is an international number, a national number or a number of other types. Example addresses: "85291234567" and "91234567".
145. Meaning: The SMSC address is formatted using the typical ISDN / telephony numbering plan (ITU E.164/E.163) and it is an international number. Example address: "+85291234567".

As address_type is an optional parameter, it can be omitted. If you do so, the GSM/GPRS modem or mobile phone will use the default value of the address_type parameter, which is:

129 if the SMSC address does not start with a "+" character. For example, "85291234567".
145 if the SMSC address starts with a "+" character. For example, "+85291234567".

21.1.2. Reading the Service Center Address

To read the service center address, you can perform a read operation using the +CSCA read command "+CSCA?". The information response returned has the following format:

+CSCA: address,address_type

The definition of address and address_type is the same as above.

21.2. Example Demonstrating How to Use the +CSCA AT Command to Set and Read the Service Center Address

Now let's see an example that demonstrates how to use the +CSCA AT command to set and read the service center address. As said earlier, sometimes a proper service center address is in use by default and there is no need to make any changes. So first let's type the read command "+CSCA?" in a terminal program (for example, HyperTerminal in Microsoft Windows) to check if a proper service center address is in use currently. The response returned from a GSM/GPRS modem or mobile phone should be something like this:

AT+CSCA?
+CSCA: "+85291111111",145

OK

If you find that the service center address is not correct, use the +CSCA AT command to change it, like this:

AT+CSCA="+85290000000",145
OK

The final result code OK indicates the service center address was set successfully. If the execution of the command line fails, the final result code will be ERROR.

from developershome .com

Operating Mode: SMS Text Mode and SMS PDU Mode (Tutorial 20)

2008-03-04T15:54:00.000-08:00

The SMS specification has defined two modes in which a GSM/GPRS modem or mobile phone can operate. They are called SMS text mode and SMS PDU mode. (PDU stands for Protocol Data Unit.) The mode that a GSM/GPRS modem or mobile phone is operating in determines the syntax of some SMS AT commands and the format of the responses returned after execution. Below are the SMS AT commands affected:

+CMGS (Send Message)
+CMSS (Send Message from Storage)
+CMGR (Read Message)
+CMGL (List Messages)
+CMGW (Write Message to Memory)
+CNMA (New Message Acknowledgement to ME/TA)
+CMGC (Send Command)

The syntax of the unsolicited result codes below also depends on the mode in which the GSM/GPRS modem or mobile phone is operating:

+CMT (Used to forward received SMS messages to the computer / PC.)
+CBM (Used to forward received cell broadcast messages to the computer / PC.)
+CDS (Used to forward received status reports to the computer / PC.)

These two AT commands are useful to you only if SMS text mode is used:

+CSMP (Set Text Mode Parameters)
+CSDH (Show Text Mode Parameters)

Comparison of SMS Text Mode and SMS PDU Mode

Below we compare SMS text mode and SMS PDU mode from various aspects. The comparison should help you learn the differences between these two modes and decide which mode should be used by your SMS messaging application.

Syntax of SMS AT Commands and Responses

When the GSM/GPRS modem or mobile phone is operating in different modes, the syntax of certain SMS AT commands and the responses returned after command execution is different. Here's an example for illustration. Let's say you would like to send the SMS message "It is easy to send text messages." to the mobile phone number +85291234567. In SMS text mode, this is the command line that you should enter:

AT+CMGS="+85291234567"It is easy to send text messages.

However, if the GSM/GPRS modem or mobile phone is operating in SMS PDU mode, executing the above command line will cause an error to occur. This is because the syntax of the +CMGS AT command is different in SMS PDU mode. To do the same task, the following command line should be used instead:

AT+CMGS=4207915892000000F001000B915892214365F7000021493A283D0795C3F33C88FE06CDCB6E32885EC6D341EDF27C1E3E97E72E

Defined Values for Certain Parameters

When the GSM/GPRS modem or mobile phone is operating in different modes, the defined values for certain parameters are different. Usually string values are defined for text mode while numeric values are defined for PDU mode. For example, the +CMGL AT command is used to list SMS messages stored in message storage. It takes one parameter that specifies the status of the SMS messages to be retrieved. The following table lists the defined values for the parameter in text mode and PDU mode:

Message status	Defined values in text mode	Defined values in PDU mode
Received unread	"REC UNREAD"	0
Received read	"REC READ"	1
Stored unsent	"STO UNSENT"	2
Stored sent	"STO SENT"	3
All messages	"ALL"	4

Suppose you would like to list all SMS messages from message storage. If the GSM/GPRS modem or mobile phone is operating in SMS text mode, you should assign the string value "ALL" to the +CMGL AT command, like this:

AT+CMGL="ALL"

In SMS PDU mode, the numeric value 4 should be assigned to the +CMGL AT command instead:

AT+CMGL=4

Input/Output Format of SMS Messages Used by SMS AT Commands

When the GSM/GPRS modem or mobile phone is operating in different modes, the input/output format of SMS messages used by SMS AT commands is different. In SMS text mode, headers and body of SMS messages are inputted/outputted as separate parameters/fields. In SMS PDU mode, TPDUs (Transport Protocol Data Units) in hexadecimal format are inputted and outputted. Headers and body of SMS messages are encoded in the TPDUs.

Here is an example for illustration. To send the SMS message "It is easy to send text messages." to the mobile phone number +85291234567, the following command line should be used in SMS text mode. As you can see below, the destination phone number header and message body are provided to the +CMGS AT command as separate parameters.

AT+CMGS="+85291234567"It is easy to send text messages.

To send the same SMS text message in SMS PDU mode, the following command line should be used instead. The message body, destination phone number header and some other headers are encoded in the hexadecimal sequence.

AT+CMGS=4207915892000000F001000B915892214365F7000021493A283D0795C3F33C88FE06CDCB6E32885EC6D341EDF27C1E3E97E72E

Ease of Use

As you can see in the previous example, it is easier to use AT commands in SMS text mode. You do not have to learn about the structure of different types of TPDUs in the bit level and the encoding and decoding of the hexadecimal sequence.

Supported Features of SMS Messaging

Although it is easier to use AT commands in SMS text mode, it supports fewer features of SMS messaging than SMS PDU mode. This is because you do not have complete control over the header values and message body in SMS text mode. Some tasks, although can be done in text mode, require the programmer to have knowledge about PDU mode and TPDU. For example, to request a status report from SMSC in SMS text mode, you have to set bit 5 of the first octet of the SMS-SUBMIT TPDU to 1 by the AT command +CSMP (command name in text: Set Text Mode Parameters). Similar tasks include setting the message validity period and sending a flash SMS message that immediately pops up on the phone screen when it arrives at the destination.

Level of Support

SMS PDU mode is more commonly supported by GSM/GPRS modems and mobile phones than SMS text mode.

from developershome .com

Getting Married, Kiss, Headache - Funny SMS

2008-03-03T15:38:00.000-08:00

Getting married is very much like going to a restaurant with friends.
You order what you want, then when you see what the other person has,
you wish you had ordered that.
(Characters: 172)

Good news! A new way to send Romantic kiss to your girlfriend.
Just call me and order your kiss.
I will personally go and deliver it.
(Characters: 133)

Mon to Sun, From Jan To Dec,
From birth till my death,
my feelings 4 u have never changed.
For me, you've always been a headache!
(Characters: 129)

I didn't love you, you are for me, I just miss YOU! - Romantic SMS

2008-02-26T18:07:00.000-08:00

If I never met you, I wouldn't like you. If I didn't like you, I wouldn't love you. If I didn't love you, I wouldn't miss you. But I did, I do, and I will.
(Characters: 158)

Let`s share the world.
A sea is for you, and waves are for me.
The sky is for you, and stars are for me.
The sun is for you, and light is for me.
Everything is for you, and you are for me...
(Characters: 198)

I miss the laughs I used to get from you,
I miss the talks we used to have.
And above all, I just miss YOU!
(Characters: 107)

Checking if the GSM/GPRS Modem or Mobile Phone Supports the Use of AT Commands to Send, Receive and Read SMS Messages (Tutorial 19)

2008-02-25T17:49:00.000-08:00

After testing the communication between the PC and GSM/GPRS modem/mobile phone, the next thing that you may want to do is to check if the GSM/GPRS modem or mobile phone supports the use of AT commands to send, receive and read SMS messages. Most GSM/GPRS modems support all three functions, while only some mobile phones do.

Sending SMS Messages

To find out whether a GSM/GPRS modem or mobile phone supports the sending of SMS messages through AT commands, you have to:

Use the AT command +CSMS (command name in text: Select Message Service) to check whether mobile-originated SMS messages are supported.
Perform test operations to check whether +CMGS (command name in text: Send Message) and/or +CMSS (command name in text: Send Message from Storage) are supported.
(You may want to check the AT commands +CMGW [command name in text: Write Message to Memory] and +CMGD [command name in text: Delete Message] in addition as they are sometimes used together with +CMSS.)

Receiving SMS Messages and Reading SMS Messages from Message Storage

To find out whether a GSM/GPRS modem or mobile phone supports the receiving and reading of SMS messages through AT commands, you have to:

Use the AT command +CSMS (command name in text: Select Message Service) to check whether mobile-terminated SMS messages are supported.
Perform test operations to check whether +CNMI (command name in text: New Message Indications to TE), +CMGL (command name in text: List Messages) and/or +CMGR (command name in text: Read Message) are supported.

If the GSM/GPRS modem or mobile phone supports the +CNMI AT command, it can send a notification or directly forward the message to the PC whenever a new SMS message arrives.

If the GSM/GPRS modem or mobile phone does not support +CNMI but supports +CMGL and/or +CMGR, the PC has to poll the GSM/GPRS modem or mobile phone repeatedly in order to know if any new SMS messages have arrived.

from developershome .com

Testing the Communication between the PC and GSM/GPRS Modem or Mobile Phone (Tutorial 18)

2008-02-25T17:45:00.000-08:00

Suppose you have connected your GSM/GPRS modem or mobile phone to your PC / computer and started a terminal program (such as HyperTerminal on Microsoft Windows). Now you are ready to enter your first command. The first thing that is usually done is to test the communication between the PC and GSM/GPRS modem/mobile phone to confirm that everything is working properly so far. Simply enter "AT" in the terminal program to perform the test. When the GSM/GPRS modem or mobile phone receives "AT", it will send back the final result code "OK" to indicate that it has received your command successfully, like this:

AT
OK

from developershome .com

MISSION IMPOSSIBLE!!, Love You, Dear - Romantic SMS

2008-02-19T15:43:00.000-08:00

I m on a mission:
Misson 2 avoid u,
2 forgetu, 2 get rid of u,
2 not 2 talk 2u or meet u,
in short....
MISSION IMPOSSIBLE!!
(Characters: 128)

D smallest word is I,
the sweetest word is LOVE
and the dearest person
in the world is U.
tats y I Love You..:)
(Characters: 115)

Dear O Dear, ur not near
but i can hear
dont get fear
Ur memories r here
liv wid cheer
no mere tear
and ur mine forever!
(Characters: 126)

AT Command Operations: Test, Set, Read and Execution (Tutorial 17)

2008-02-19T15:39:00.000-08:00

There are four types of AT command operations:

Test operation. A test operation is used to check whether a certain AT command is supported by the GSM/GPRS modem or mobile phone.
Set operation. A set operation is used to change the settings used by the GSM/GPRS modem or mobile phone for certain tasks.
Read operation. A read operation is used to retrieve the current settings used by the GSM/GPRS modem or mobile phone for certain tasks.
Execution operation. An execution operation is used to perform an action or retrieve information/status about the GSM/GPRS modem or mobile phone.

The command syntax for performing an operation will be described in detail in the following sections.

Test Command -- Checks Whether a Certain AT Command is Supported

A test operation is used to check whether a certain AT command is supported by the GSM/GPRS modem or mobile phone. All extended AT commands support the test operation. The syntax is:

command=?

where command is an AT command. When an AT command is used in the above syntax to perform a test operation, it is called a test command.

Here is an example. The AT command +CGMI (command name in text: Request Manufacturer Identification) is used to get the manufacturer name of the GSM/GPRS modem or mobile phone. To test whether +CGMI is supported, you can make use of the test command "+CGMI=?". The complete command line that should be entered is:

AT+CGMI=?

If the GSM/GPRS modem or mobile phone supports the AT command +CGMI, the result code "OK" will be returned, like this:

AT+CGMI=?
OK

If the GSM/GPRS modem or mobile phone does not support the AT command +CGMI, the result code "ERROR" will be returned, like this:

AT+CGMI=?
ERROR

In the above example, the AT command +CGMI does not have any parameters. If the AT command to be tested has parameter(s), the parameter value(s) supported by the GSM/GPRS modem or mobile phone may be printed additionally. Below is an example that illustrates the format of the response. +COMMAND1 is a fictitious AT command that has four parameters.

AT+COMMAND1=?
+COMMAND1: (0,1),(0-10),(0,1,5-10),("GSM","UCS2")

OK

The supported values of each of the four parameters are enclosed in parentheses. Commas are used to delimit the parentheses and the values inside parentheses. A hyphen is used to indicate a range of values. The values inside parentheses can be of the string type.

In the above example, the response of the test command "+COMMAND1=?" provides us the following information:

(0,1). The first parameter accepts either 0 or 1.
(0-10). The second parameter accepts any integer between 0 and 10.
(0,1,5-10). The third parameter accepts 0, 1 or any integer between 5 and 10.
("GSM","UCS2"). The fourth parameter accepts either the string "GSM" or "UCS2".

To a few AT commands, the test operation does not return the parameter values supported. Instead, it returns the values that are allowed to appear in the information response of the AT command. An example is the +CBC AT command (command name in text: Battery Charge). The +CBC command is used to retrieve the connection status and charge level of the battery of the mobile device. Two values are returned in the information response of the +CBC AT command. The format is:

+CBC: connection_status,charge_level

For example, if the battery is placed in the mobile device with no charger connected and the charge level is 80%, the result of the execution of the +CBC AT command will be:

AT+CBC
+CBC: 0,80

OK

If you run the test command "+CBC=?", all the supported values that are allowed to appear in the connection status field and charge level field will be provided. With my Nokia 6021, the result is:

AT+CBC=?
+CBC: (0,1),(0-100)

OK

"(0,1)" means the connection status field in the information response of the +CBC AT command can contain either 0 or 1, while "(0-100)" means the charge level field can contain any integer between 0 and 100.

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Result Codes of AT Commands (Tutorial 16)

2008-02-17T15:32:00.000-08:00

Result codes are messages sent from the GSM/GPRS modem or mobile phone to provide you information about the execution of an AT command and the occurrence of an event. Two types of result codes are useful to you when dealing with AT commands for SMS messaging:

Final result codes
Unsolicited result codes

Final Result Codes of AT Commands

A final result code marks the end of an AT command response. It is an indication that the GSM/GPRS modem or mobile phone has finished the execution of a command line. Two frequently used final result codes are OK and ERROR. Only one final result code will be returned for each command line. Thus, you will not see both OK and ERROR in the response of a command line.

1. The OK Final Result Code

The OK final result code indicates that a command line has been executed successfully by the GSM/GPRS modem or mobile phone. It always starts and ends with a carriage return character and a linefeed character.

Here is an example for illustration. Let's say you send the command line "AT+CMGL;+CGMI" to your GSM/GPRS modem. The AT command "+CMGL" is used to list SMS messages stored in the message storage area and the AT command "+CGMI" is used to get the manufacturer name of the GSM/GPRS modem. If everything works properly without any errors, the command line, together with the response returned, should be something similar to this:

AT+CMGL;+CGMI
+CMGL: 1,"REC UNREAD","+85291234567",,"06/11/11,00:30:29+32"
Welcome to our SMS tutorial.
Nokia
OK

As mentioned earlier, when a terminal program such as HyperTerminal of Microsoft Windows sees a carriage return character, it moves the cursor to the beginning of the current line. When it sees a linefeed character, it moves the cursor to the same position on the next line. Hence, the command line you entered, together with the response returned, will be displayed like this in a terminal program such as HyperTerminal of Microsoft Windows:

AT+CMGL;+CGMI
+CMGL: 1,"REC UNREAD","+85291234567",,"06/11/11,00:30:29+32"
Welcome to our SMS tutorial.

Nokia

OK

2. The ERROR Final Result Code

The ERROR final result code indicates that an error occurs when the GSM/GPRS modem or mobile phone tries to execute a command line. After the occurrence of an error, the GSM/GPRS modem or mobile phone will not process the remaining AT commands in the command-line string.

Below are some common causes of error:

The syntax of the command line is incorrect.
The value specified to a certain parameter is invalid.
The name of the AT command is spelt incorrectly.
The GSM/GPRS modem or mobile phone does not support one or more of the AT commands, command parameters or parameter values in the command-line string.

Like the OK final result code, the ERROR final result code always starts and ends with a carriage return character and a linefeed character.

Here is an example for illustration. Suppose you want to instruct your GSM/GPRS modem to list SMS messages from the message storage area and get the manufacturer name of the GSM/GPRS modem. You intend to type the command line "AT+CMGL;+CGMI" but make a careless mistake by typing "+CMFL" instead of "+CMGL". The GSM/GPRS modem will return the ERROR final result code, as shown below:

AT+CMFL;+CGMI
ERROR

As an error occurs when the GSM/GPRS modem processes "+CMFL", the GSM/GPRS modem stops the execution of the command line and so the second AT command "+CGMI" is not processed.

If you type the second AT command "+CGMI" incorrectly instead of the first AT command "+CMGL", the GSM/GPRS modem will output the result of the execution of the AT command "+CMGL" before outputting the ERROR final result code, like this:

AT+CMGL;+CGMU
+CMGL: 1,"REC UNREAD","+85291234567",,"06/11/11,00:30:29+32"
Welcome to our SMS tutorial.
ERROR

AT+CMGL;+CGMU
+CMGL: 1,"REC UNREAD","+85291234567",,"06/11/11,00:30:29+32"
Welcome to our SMS tutorial.

ERROR

from developershome .com

Don't wait, Love isn't a decision,make a love - Romantic SMS

2008-02-10T16:56:00.000-08:00

Don't wait until it's too late to tell someone how much you love, how much you care. Because when they're gone, no matter how loud you shout and cry, they won't hear you anymore.
(Characters: 178)

Love isn't a decision, it's a feeling. If we could decide who to love, then, life would be much simpler, but then less magical.
(Characters: 127)

24hrs make a lovely day,
7 days make a lovely week,
52 weeks make a lovely year & knowing a
person like me will make ur life lovely.

Have a lovely day n life!**
(Characters: 167)

General Syntax of Extended AT Commands (Tutorial 15)

2008-02-07T16:55:00.000-08:00

The general syntax of extended AT commands is straightforward. The syntax rules are provided below. The syntax of basic AT commands is slightly different. We will not cover the syntax of basic AT commands in this SMS tutorial since all SMS messaging commands are extended AT commands.

Syntax rule 1. All command lines must start with "AT" and end with a carriage return character. (We will use to represent a carriage return character in this SMS tutorial.) In a terminal program like HyperTerminal of Microsoft Windows, you can press the Enter key on the keyboard to output a carriage return character.

Example: To list all unread inbound SMS messages stored in the message storage area, type "AT", then the extended AT command "+CMGL", and finally a carriage return character, like this:

AT+CMGL

Syntax rule 2. A command line can contain more than one AT command. Only the first AT command should be prefixed with "AT". AT commands in the same command-line string should be separated with semicolons.

Example: To list all unread inbound SMS messages stored in the message storage area and obtain the manufacturer name of the mobile device, type "AT", then the extended AT command "+CMGL", followed by a semicolon and the next extended AT command "+CGMI":

AT+CMGL;+CGMI

An error will occur if both AT commands are prefixed with "AT", like this:

AT+CMGL;AT+CGMI

Syntax rule 3. A string is enclosed between double quotes.

Example: To read all SMS messages from message storage in SMS text mode (at this time you do not need to know what SMS text mode is. More information will be provided later in this SMS tutorial), you need to assign the string "ALL" to the extended AT command +CMGL, like this:

AT+CMGL="ALL"

Syntax rule 4. Information responses and result codes (including both final result codes and unsolicited result codes) always start and end with a carriage return character and a linefeed character.

Example: After sending the command line "AT+CGMI" to the mobile device, the mobile device should return a response similar to this:

Nokia
OK

The first line is the information response of the AT command +CGMI and the second line is the final result code. and represent a carriage return character and a linefeed character respectively. The final result code "OK" marks the end of the response. It indicates no more data will be sent from the mobile device to the computer / PC.

When a terminal program such as HyperTerminal of Microsoft Windows sees a carriage return character, it moves the cursor to the beginning of the current line. When it sees a linefeed character, it moves the cursor to the same position on the next line. Hence, the command line "AT+CGMI" that you entered and the corresponding response will be displayed like this in a terminal program such as HyperTerminal of Microsoft Windows:

AT+CGMI
Nokia

OK

Information Response and Final Result Code

Don't forget the meanings of information response and final result code stated above, since you will see these two terms frequently as you go through this SMS tutorial.

AT+CGMI <-- Command line entered
Nokia <-- Information response

OK <-- Final result code

Case Sensitivity of AT Commands

In the SMS specification, all AT commands are in uppercase letters. However, many GSM/GPRS modems and mobile phones allow you to type AT commands in either uppercase or lowercase letters. For example, on Nokia 6021, AT commands are case-insensitive and the following two command lines are equivalent:

AT+CMGL

at+cmgl

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Introduction to AT Commands (Tutorial 14)

2008-02-07T16:50:00.000-08:00

AT commands are instructions used to control a modem. AT is the abbreviation of ATtention. Every command line starts with "AT" or "at". That's why modem commands are called AT commands. Many of the commands that are used to control wired dial-up modems, such as ATD (Dial), ATA (Answer), ATH (Hook control) and ATO (Return to online data state), are also supported by GSM/GPRS modems and mobile phones. Besides this common AT command set, GSM/GPRS modems and mobile phones support an AT command set that is specific to the GSM technology, which includes SMS-related commands like AT+CMGS (Send SMS message), AT+CMSS (Send SMS message from storage), AT+CMGL (List SMS messages) and AT+CMGR (Read SMS messages).

Note that the starting "AT" is the prefix that informs the modem about the start of a command line. It is not part of the AT command name. For example, D is the actual AT command name in ATD and +CMGS is the actual AT command name in AT+CMGS. However, some books and web sites use them interchangeably as the name of an AT command.

Here are some of the tasks that can be done using AT commands with a GSM/GPRS modem or mobile phone:

Get basic information about the mobile phone or GSM/GPRS modem. For example, name of manufacturer (AT+CGMI), model number (AT+CGMM), IMEI number (International Mobile Equipment Identity) (AT+CGSN) and software version (AT+CGMR).
Get basic information about the subscriber. For example, MSISDN (AT+CNUM) and IMSI number (International Mobile Subscriber Identity) (AT+CIMI).
Get the current status of the mobile phone or GSM/GPRS modem. For example, mobile phone activity status (AT+CPAS), mobile network registration status (AT+CREG), radio signal strength (AT+CSQ), battery charge level and battery charging status (AT+CBC).
Establish a data connection or voice connection to a remote modem (ATD, ATA, etc).
Send and receive fax (ATD, ATA, AT+F*).
Send (AT+CMGS, AT+CMSS), read (AT+CMGR, AT+CMGL), write (AT+CMGW) or delete (AT+CMGD) SMS messages and obtain notifications of newly received SMS messages (AT+CNMI).
Read (AT+CPBR), write (AT+CPBW) or search (AT+CPBF) phonebook entries.
Perform security-related tasks, such as opening or closing facility locks (AT+CLCK), checking whether a facility is locked (AT+CLCK) and changing passwords (AT+CPWD).
(Facility lock examples: SIM lock [a password must be given to the SIM card every time the mobile phone is switched on] and PH-SIM lock [a certain SIM card is associated with the mobile phone. To use other SIM cards with the mobile phone, a password must be entered.])
Control the presentation of result codes / error messages of AT commands. For example, you can control whether to enable certain error messages (AT+CMEE) and whether error messages should be displayed in numeric format or verbose format (AT+CMEE=1 or AT+CMEE=2).
Get or change the configurations of the mobile phone or GSM/GPRS modem. For example, change the GSM network (AT+COPS), bearer service type (AT+CBST), radio link protocol parameters (AT+CRLP), SMS center address (AT+CSCA) and storage of SMS messages (AT+CPMS).
Save and restore configurations of the mobile phone or GSM/GPRS modem. For example, save (AT+CSAS) and restore (AT+CRES) settings related to SMS messaging such as the SMS center address.

Note that mobile phone manufacturers usually do not implement all AT commands, command parameters and parameter values in their mobile phones. Also, the behavior of the implemented AT commands may be different from that defined in the standard. In general, GSM/GPRS modems designed for wireless applications have better support of AT commands than ordinary mobile phones.

In addition, some AT commands require the support of mobile network operators. For example, SMS over GPRS can be enabled on some GPRS mobile phones and GPRS modems with the +CGSMS command (command name in text: Select Service for MO SMS Messages). But if the mobile network operator does not support the transmission of SMS over GPRS, you cannot use this feature.

Basic Commands and Extended Commands

There are two types of AT commands: basic commands and extended commands.

Basic commands are AT commands that do not start with "+". For example, D (Dial), A (Answer), H (Hook control) and O (Return to online data state) are basic commands.

Extended commands are AT commands that start with "+". All GSM AT commands are extended commands. For example, +CMGS (Send SMS message), +CMSS (Send SMS message from storage), +CMGL (List SMS messages) and +CMGR (Read SMS messages) are extended commands.

from developershome .com

How to Use Microsoft HyperTerminal to Send AT Commands to a Mobile Phone or GSM/GPRS Modem? (Tutorial 13)

2008-02-07T16:47:00.000-08:00

What is Microsoft HyperTerminal?

Microsoft HyperTerminal is a small program that comes with Microsoft Windows. You can use it to send AT commands to your mobile phone or GSM/GPRS modem. It can be found at Start -> Programs -> Accessories -> Communications -> HyperTerminal. If you cannot find it and you are using Windows 98, then probably you have not installed it. You can go to Control Panel -> Add/Remove Programs -> Windows Setup tab -> Communications list box item -> Details button to install MS HyperTerminal.

Before you start programming your SMS application, you may want to check if your mobile phone, GSM/GPRS modem and SIM card are working properly first. The MS HyperTerminal is a handy tool when it comes to testing your GSM devices. It is a good idea to test your GSM devices beforehand. When a problem occurs, sometimes it is difficult to tell what causes the problem. The cause can be your program, the GSM device or the SIM card. If you test your GSM device and SIM card with MS HyperTerminal and they operate properly, then it is very likely that the problem is caused by your program.

For Linux users, minicom can be used instead of HyperTerminal.

13.2. The Procedure for Sending AT Commands to a Mobile Phone or GSM/GPRS Modem Using MS HyperTerminal

To use MS HyperTerminal to send AT commands to your mobile phone or GSM/GPRS modem, you can follow the procedure below:

Put a valid SIM card into the mobile phone or GSM/GPRS modem. You can obtain a SIM card by subscribing to the GSM service of a wireless network operator.
Connect your mobile phone or GSM/GPRS modem to a computer and set up the corresponding wireless modem driver. You should find the wireless modem driver in the CD or disk that was provided by the manufacturer. If the manufacturer does not provide such CD or disk with your mobile phone or GSM/GPRS modem, you can go to the manufacturer's web site and see whether the wireless modem driver can be downloaded there. If the wireless modem driver cannot be found on the web site, you can still use Windows' standard modem driver.
Run MS HyperTerminal by selecting Start -> Programs -> Accessories -> Communications -> HyperTerminal.
In the Connection Description dialog box, enter a name and choose an icon you like for the connection. Then click the OK button.

Figure 5. The screenshot of MS HyperTerminal's Connection Description dialog box in Windows 98.

In the Connect To dialog box, choose the COM port that your mobile phone or GSM/GPRS modem is connecting to in the Connect using combo box. For example, choose COM1 if your mobile phone or GSM/GPRS modem is connecting to the COM1 port. Then click the OK button.

(Sometimes there will have more than one COM port in the Connect using combo box. To know which COM port is used by your mobile phone or GSM/GPRS modem, follow the procedure below:

In Windows 98:
Go to Control Panel -> Modem. Then click the Diagnostics tab. In the list box, you can see which COM port the mobile phone or GSM/GPRS modem is connected to.

In Windows 2000 and Windows XP:
Go to Control Panel -> Phone and Modem Options. Then click the Modems tab. In the list box, you can see which COM port the mobile phone or GSM/GPRS modem is connected to.)

Figure 6. The screenshot of MS HyperTerminal's Connect To dialog box in Windows 98.

The Properties dialog box comes out. Enter the correct port settings for your mobile phone or GSM/GPRS modem. Then click the OK button.

(To find the correct port settings that should be used with your mobile phone or GSM/GPRS modem, one way is to consult the manual of your mobile phone or GSM/GPRS modem. Another way is to check the port settings used by the wireless modem driver that you installed earlier.

To check the port settings used by the wireless modem driver on Windows 98, follow these steps:
a. Go to Control Panel -> Modem.
b. Select your mobile phone or GSM/GPRS modem in the list box.
c. Click the Properties button.
d. The Properties dialog box appears. The Maximum speeds field on the General tab corresponds to HyperTerminal's Bits per second field. Click the Connection tab and you can find the settings for data bits, parity and stop bits. Click the Advanced button and you can find the setting for flow control.

To check the port settings used by the wireless modem driver on Windows 2000 and Windows XP, follow these steps:
a. Go to Control Panel -> Phone and Modem Options -> Modems tab.
b. Select your mobile phone or GSM/GPRS modem in the list box.
c. Click the Properties button.
d. The Properties dialog box appears. Click the Advanced tab and then click the Change Default Preferences button.
e. The Change Default Preferences dialog box appears. The Port speed field on the General tab corresponds to HyperTerminal's Bits per second field. You can also find the setting for flow control on the General tab. On the Advanced tab, you can find the settings for data bits, parity and stop bits.)

Figure 7. The screenshot of MS HyperTerminal's Properties dialog box in Windows 98.

Type "AT" in the main window. A response "OK" should be returned from the mobile phone or GSM/GPRS modem.
Type "AT+CPIN?" in the main window. The AT command "AT+CPIN?" is used to query whether the mobile phone or GSM/GPRS modem is waiting for a PIN (personal identification number, i.e. password). If the response is "+CPIN: READY", it means the SIM card does not require a PIN and it is ready for use. If your SIM card requires a PIN, you need to set the PIN with the AT command "AT+CPIN=".

Figure 8. The screenshot of MS HyperTerminal's main window in Windows 98.

If you get the responses above, your mobile phone or GSM/GPRS modem is working properly. You can start typing your own AT commands to control the mobile phone or GSM/GPRS modem.

Further details about how to use AT commands to send and receive SMS messages will be provided in the following sections.

from developershome .com

Introduction to GSM / GPRS Wireless Modems - Tutorial(12)

2008-02-07T16:27:00.000-08:00

What is a GSM Modem?

A GSM modem is a wireless modem that works with a GSM wireless network. A wireless modem behaves like a dial-up modem. The main difference between them is that a dial-up modem sends and receives data through a fixed telephone line while a wireless modem sends and receives data through radio waves.

A GSM modem can be an external device or a PC Card / PCMCIA Card. Typically, an external GSM modem is connected to a computer through a serial cable or a USB cable. A GSM modem in the form of a PC Card / PCMCIA Card is designed for use with a laptop computer. It should be inserted into one of the PC Card / PCMCIA Card slots of a laptop computer.

Like a GSM mobile phone, a GSM modem requires a SIM card from a wireless carrier in order to operate.

As mentioned in earlier sections of this SMS tutorial, computers use AT commands to control modems. Both GSM modems and dial-up modems support a common set of standard AT commands. You can use a GSM modem just like a dial-up modem.

In addition to the standard AT commands, GSM modems support an extended set of AT commands. These extended AT commands are defined in the GSM standards. With the extended AT commands, you can do things like:

Reading, writing and deleting SMS messages.
Sending SMS messages.
Monitoring the signal strength.
Monitoring the charging status and charge level of the battery.
Reading, writing and searching phone book entries.

The number of SMS messages that can be processed by a GSM modem per minute is very low -- only about six to ten SMS messages per minute.

What is a GPRS Modem?

A GPRS modem is a GSM modem that additionally supports the GPRS technology for data transmission. GPRS stands for General Packet Radio Service. It is a packet-switched technology that is an extension of GSM. (GSM is a circuit-switched technology.) A key advantage of GPRS over GSM is that GPRS has a higher data transmission speed.

GPRS can be used as the bearer of SMS. If SMS over GPRS is used, an SMS transmission speed of about 30 SMS messages per minute may be achieved. This is much faster than using the ordinary SMS over GSM, whose SMS transmission speed is about 6 to 10 SMS messages per minute. A GPRS modem is needed to send and receive SMS over GPRS. Note that some wireless carriers do not support the sending and receiving of SMS over GPRS.

If you need to send or receive MMS messages, a GPRS modem is typically needed.

Which is Better: Mobile Phone or GSM / GPRS Modem?

In general, a GSM/GPRS modem is recommended for use with a computer to send and receive messages. This is because some mobile phones have certain limitations comparing to GSM/GPRS modems. Some of the limitations are described below:

Some mobile phone models (example: Ericsson R380) cannot be used with a computer to receive concatenated SMS messages.

What is a concatenated SMS message?
A concatenated SMS message is a message that contains more than 140 bytes. (A normal SMS message can only contain at most 140 bytes.) Concatenated SMS works like this: the sender's mobile device breaks a message longer than 140 bytes into smaller parts. Each of these parts are then fitted in a single SMS message and sent to the recipient. When these SMS messages reach the destination, the recipient's mobile device will combine them back to one message.

What is the cause of the problem?
When the mobile phone receives the SMS messages that are parts of a concatenated SMS message, it combines them to one message automatically. The correct behavior should be: when the mobile phone receives the SMS messages that are parts of a concatenated SMS message, it forwards them to the computer without combining them.
Many mobile phone models cannot be used with a computer to receive MMS messages. Because when they receive a MMS notification, they handle it automatically instead of forwarding it to the computer.
A mobile phone may not support some AT commands, command parameters and parameter values. For example, some mobile phones do not support the sending and receiving of SMS messages in text mode. So, the AT command "AT+CMGF=1" (it instructs the mobile phone to use text mode) will cause an error message to be returned. Usually GSM/GPRS modems support a more complete set of AT commands than mobile phones.
Most SMS messaging applications have to be available 24 hours a day. (For example, an SMS messaging application that provides ringtone downloading service should be running all the time so that a user can download ringtones any time he/she wants.) If such SMS messaging applications use mobile phones to send and receive SMS messages, the mobile phones have to be switched on all the time. However, some mobile phone models cannot operate with the battery removed even when an AC adaptor is connected, which means the battery will be charged 24 hours a day.

Besides the above issues, mobile phones and GSM/GPRS modems are more or less the same for sending and receiving SMS messages from a computer. Actually, you can consider an AT-command-enabled mobile phone as "GSM/GPRS modem + keypad + display + ...".

There is not much difference between mobile phones and GSM/GPRS modems in terms of SMS transmission rate, since the determining factor for the SMS transmission rate is the wireless network.

from developershome .com

Privacy Policy

2008-02-01T17:10:00.000-08:00

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How to Receive SMS Messages Using a Computer / PC? - Tutorial(11)

2008-02-01T16:59:00.000-08:00

In general, there are three ways to receive SMS messages using your computer / PC:

Connect a mobile phone or GSM/GPRS modem to a computer / PC. Then use the computer / PC and AT commands to get the received SMS messages from the mobile phone or GSM/GPRS modem.
Get access to the SMS center (SMSC) or SMS gateway of a wireless carrier. Any SMS messages received will be forwarded to your computer / PC using a protocol / interface supported by the SMSC or SMS gateway.
Get access to the SMS gateway of an SMS service provider. Any SMS messages received will be forwarded to your computer / PC using a protocol / interface supported by the SMS gateway.

If you do not want to develop SMS software or applications but just want to use your computer / PC to receive text messages, you may want to read our Quick Guide for Non-Developers.

The 1st Way: Using a Computer to Receive SMS Messages through a Mobile Phone or GSM/GPRS Modem

Receiving SMS messages through a mobile phone or GSM/GPRS modem has a major advantage over the other two ways -- wireless carriers usually do not charge any fees for receiving incoming SMS messages with their SIM cards. The disadvantage of receiving SMS messages this way is that a mobile phone or GSM/GPRS modem cannot handle a large amount of SMS traffic. One way to overcome this is to load balance the SMS traffic with a pool of mobile phones or GSM/GPRS modems. Each mobile phone or GSM/GPRS modem will have its own SIM card and mobile phone number.

In terms of programming, sending and receiving SMS messages through a mobile phone or GSM/GPRS modem are similar. What you need to do is to send instructions (in the form of AT commands) to the mobile phone or GSM/GPRS modem.

The following table lists the AT commands that are related to the receiving and reading of SMS messages:

AT command	Meaning
+CNMI	New message indications
+CMGL	List messages
+CMGR	Read messages
+CNMA	New message acknowledgement

Below shows a simple example that demonstrates how to use AT commands and the HyperTerminal program of Microsoft Windows to read SMS text messages received by a GSM / GPRS modem or mobile phone. The lines in bold type are the command lines that should be entered in HyperTerminal. The other lines are responses returned from the GSM / GPRS modem or mobile phone.

AT
OK
AT+CMGF=1
OK
AT+CMGL="ALL"
+CMGL: 1,"REC READ","+85291234567",,"06/11/11,00:30:29+32"
Hello, welcome to our SMS tutorial.
+CMGL: 2,"REC READ","+85291234567",,"06/11/11,00:32:20+32"
A simple demo of SMS text messaging.

OK

Here is a description of what is done in the above example:

Line 1: "AT" is sent to the GSM / GPRS modem to test the connection. The GSM / GPRS modem sends back the result code "OK" (line 2), which means the connection between the HyperTerminal program and the GSM / GPRS modem works fine.
Line 3: The AT command +CMGF is used to instruct the GSM / GPRS modem to operate in SMS text mode. The result code "OK" is returned (line 4), which indicates the command line "AT+CMGF=1" has been executed successfully. If the result code "ERROR" is returned, it is likely that the GSM / GPRS modem does not support the SMS text mode. To confirm, type "AT+CMGF=?" in the HyperTerminal program. If the response is "+CMGF: (0,1)" (0=PDU mode and 1=text mode), then SMS text mode is supported. If the response is "+CMGF: (0)", then SMS text mode is not supported.
Line 5-9: The AT command +CMGL is used to list all SMS text messages in the message storage of the GSM / GPRS modem. There are two SMS text messages in the message storage: "Hello, welcome to our SMS tutorial." and "A simple demo of SMS text messaging.". "+85291234567" is the sender mobile phone number. "06/11/11,00:30:29+32" and "06/11/11,00:32:20+32" tell us when the SMS text messages were received by the SMSC. "+32" is the time zone. Note that the unit is a quarter of an hour. So, +32 means GMT+8 hours, since 32 quarters of an hour = 8 hours. "REC READ" indicates both of the SMS text messages have been read before.
Line 11: The result code "OK" indicates the execution of the AT command +CMGL is successful.

To enable an application to receive SMS messages, you have to write the source code for connecting to and sending AT commands to the mobile phone or GSM/GPRS modem, just like what a terminal program (such as HyperTerminal of Microsoft Windows) does. You can write the source code in C, C++, Java, Visual Basic, Delphi or other programming languages you like.

However, like what we have discussed in the earlier section "The 1st Way: Sending SMS Messages from a Computer Using a Mobile Phone or GSM/GPRS Modem", usually a better solution is to use a high-level SMS messaging API (Application programming interface) / SDK (Software development kit) / library instead of writing your own code for interacting with the mobile phone or GSM/GPRS modem via AT commands. The API / SDK / library encapsulates the low-level details. So, an SMS application developer does not need to know AT commands and the composition of SMS messages in the bit-level. Some SMS messaging APIs / SDKs / libraries support SMSC protocols in addition to AT commands. To move from a wireless-modem-based SMS solution to a SMSC-based SMS solution, usually you just need to modify a configuration file / property file or make a few changes to your SMS messaging application's source code. The links to some open source and free SMS messaging libraries can be found in the article "Free Libraries/Tools for Sending/Receiving SMS with a Computer".

Another high-level solution is to place an SMS gateway between the SMS messaging application and the mobile phone or GSM/GPRS modem. The SMS messaging application can then use simple protocols such as HTTP / HTTPS for receiving SMS messages. If an SMSC protocol (e.g. SMPP, CIMD, etc) is used for communicating with the SMS gateway instead of HTTP / HTTPS, an SMS messaging API / SDK / library can be very helpful to you since it encapsulates the SMSC protocol's details.

from developershome .com

How to Send SMS Messages from a Computer / PC? - Tutorial(10)

2008-02-01T16:48:00.000-08:00

In general, there are two ways to send SMS messages from a computer / PC to a mobile phone:

Connect a mobile phone or GSM/GPRS modem to a computer / PC. Then use the computer / PC and AT commands to instruct the mobile phone or GSM/GPRS modem to send SMS messages.
Connect the computer / PC to the SMS center (SMSC) or SMS gateway of a wireless carrier or SMS service provider. Then send SMS messages using a protocol / interface supported by the SMSC or SMS gateway.

If you do not want to develop SMS software or applications but just want to use your computer / PC to send text messages, you may want to read our Quick Guide for Non-Developers.

The 1st Way: Sending SMS Messages from a Computer Using a Mobile Phone or GSM/GPRS Modem

The SMS specification has defined a way for a computer to send SMS messages through a mobile phone or GSM/GPRS modem. A GSM/GPRS modem is a wireless modem that works with GSM/GPRS wireless networks. A wireless modem is similar to a dial-up modem. The main difference is that a wireless modem transmits data through a wireless network whereas a dial-up modem transmits data through a copper telephone line. More information about GSM/GPRS modems will be provided in the section "Introduction to GSM / GPRS Wireless Modems". Most mobile phones can be used as a wireless modem. However, some mobile phones have certain limitations comparing to GSM/GPRS modems. This will be discussed in the section "Which is Better: Mobile Phone or GSM / GPRS Modem" later.

To send SMS messages, first place a valid SIM card from a wireless carrier into a mobile phone or GSM/GPRS modem, which is then connected to a computer. There are several ways to connect a mobile phone or GSM/GPRS modem to a computer. For example, they can be connected through a serial cable, a USB cable, a Bluetooth link or an infrared link. The actual way to use depends on the capability of the mobile phone or GSM/GPRS modem. For example, if a mobile phone does not support Bluetooth, it cannot connect to the computer through a Bluetooth link.

After connecting a mobile phone or GSM/GPRS modem to a computer, you can control the mobile phone or GSM/GPRS modem by sending instructions to it. The instructions used for controlling the mobile phone or GSM/GPRS modem are called AT commands. (AT commands are also used to control dial-up modems for wired telephone system.) Dial-up modems, mobile phones and GSM/GPRS modems support a common set of standard AT commands. In addition to this common set of standard AT commands, mobile phones and GSM/GPRS modems support an extended set of AT commands. One use of the extended AT commands is to control the sending and receiving of SMS messages.

The following table lists the AT commands that are related to the writing and sending of SMS messages:

AT command	Meaning
+CMGS	Send message
+CMSS	Send message from storage
+CMGW	Write message to memory
+CMGD	Delete message
+CMGC	Send command
+CMMS	More messages to send

One way to send AT commands to a mobile phone or GSM/GPRS modem is to use a terminal program. A terminal program's function is like this: It sends the characters you typed to the mobile phone or GSM/GPRS modem. It then displays the response it receives from the mobile phone or GSM/GPRS modem on the screen. The terminal program on Microsoft Windows is called HyperTerminal. More details about the use of Microsoft HyperTerminal can be found in the "How to Use Microsoft HyperTerminal to Send AT Commands to a Mobile Phone or GSM/GPRS Modem" section of this SMS tutorial.

Below shows a simple example that demonstrates how to use AT commands and the HyperTerminal program of Microsoft Windows to send an SMS text message. The lines in bold type are the command lines that should be entered in HyperTerminal. The other lines are responses returned from the GSM / GPRS modem or mobile phone.

AT
OK
AT+CMGF=1
OK
AT+CMGW="+85291234567"
> A simple demo of SMS text messaging.
+CMGW: 1

OK
AT+CMSS=1
+CMSS: 20

OK

Here is a description of what is done in the above example:

Line 1: "AT" is sent to the GSM / GPRS modem to test the connection. The GSM / GPRS modem sends back the result code "OK" (line 2), which means the connection between the HyperTerminal program and the GSM / GPRS modem works fine.
Line 3: The AT command +CMGF is used to instruct the GSM / GPRS modem to operate in SMS text mode. The result code "OK" is returned (line 4), which indicates the command line "AT+CMGF=1" has been executed successfully. If the result code "ERROR" is returned, it is likely that the GSM / GPRS modem does not support the SMS text mode. To confirm, type "AT+CMGF=?" in the HyperTerminal program. If the response is "+CMGF: (0,1)" (0=PDU mode and 1=text mode), then SMS text mode is supported. If the response is "+CMGF: (0)", then SMS text mode is not supported.
Line 5 and 6: The AT command +CMGW is used to write an SMS text message to the message storage of the GSM / GPRS modem. "+85291234567" is the recipient mobile phone number. After typing the recipient mobile phone number, you should press the Enter button of the keyboard. The GSM / GPRS modem will then return a prompt "> " and you can start typing the SMS text message "A simple demo of SMS text messaging.". When finished, press Ctrl+z of the keyboard.
Line 7: "+CMGW: 1" tells us that the index assigned to the SMS text message is 1. It indicates the location of the SMS text message in the message storage.
Line 9: The result code "OK" indicates the execution of the AT command +CMGW is successful.
Line 10: The AT command +CMSS is used to send the SMS text message from the message storage of the GSM / GPRS modem. "1" is the index of the SMS text message obtained from line 7.
Line 11: "+CMSS: 20" tells us that the reference number assigned to the SMS text message is 20.
Line 13: The result code "OK" indicates the execution of the AT command +CMSS is successful.

To send SMS messages from an application, you have to write the source code for connecting to and sending AT commands to the mobile phone or GSM/GPRS modem, just like what a terminal program does. You can write the source code in C, C++, Java, Visual Basic, Delphi or other programming languages you like. However, writing your own code has a few disadvantages:

You have to learn how to use AT commands.
You have to learn how to compose the bits and bytes of an SMS message. For example, to specify the character encoding (e.g. 7-bit encoding and 16-bit Unicode encoding) of an SMS message, you need to know which bits in the message header should be modified and what value should be assigned.
Sending SMS messages with a mobile phone or GSM/GPRS modem has a drawback -- the SMS transmission speed is low. As your SMS messaging application becomes more popular, it has to handle a larger amount of SMS traffic and finally the mobile phone or GSM/GPRS modem will not be able to take the load. To obtain a high SMS transmission speed, a direct connection to an SMSC or SMS gateway of a wireless carrier or SMS service provider is needed. However, AT commands are not used for communicating with an SMS center or SMS gateway. This means your have to make a big change to your SMS messaging application in order to move from a wireless-modem-based solution to a SMSC-based solution.

In most cases, instead of writing your own code for interacting with the mobile phone or GSM/GPRS modem via AT commands, a better solution is to use a high-level SMS messaging API (Application programming interface) / SDK (Software development kit) / library. The API / SDK / library encapsulates the low-level details. So, an SMS application developer does not need to know AT commands and the composition of SMS messages in the bit-level. Some SMS messaging APIs / SDKs / libraries support SMSC protocols in addition to AT commands. To move from a wireless-modem-based SMS solution to a SMSC-based SMS solution, usually you just need to modify a configuration file / property file or make a few changes to your SMS messaging application's source code.

The links to some open source and free SMS messaging libraries can be found in the article "Free Libraries/Tools for Sending/Receiving SMS with a Computer".

Another way to hide the low-level AT command layer is to place an SMS gateway between the SMS messaging application and the mobile phone or GSM/GPRS modem. (This has been described in the section "What is an SMS Gateway?" earlier.) Simple protocols such as HTTP / HTTPS can then be used for sending SMS messages in the application. If an SMSC protocol (e.g. SMPP, CIMD, etc) is used for communicating with the SMS gateway instead of HTTP / HTTPS, an SMS messaging API / SDK / library can be very helpful to you since it encapsulates the SMSC protocol's details.

Usually a list of supported / unsupported mobile phones or wireless modems is provided on the web site of an SMS messaging API / SDK / library or an SMS gateway software package. Remember to check the list if you are going to use an SMS messaging API / SDK / library or an SMS gateway software package.

Major Drawback of Sending SMS Messages through a Mobile Phone or GSM/GPRS Modem -- Low SMS Sending Rate

Using a mobile phone or GSM/GPRS modem to send SMS messages has a major drawback, that is the SMS sending rate is too low. Only 6-10 SMS messages can be sent per minute (when the "SMS over GSM" mode is used). The performance is not affected by the connection between the computer and the mobile phone or GSM/GPRS modem (i.e. the SMS sending rate is about the same no matter the mobile phone or GSM/GPRS modem is connected to the computer through a serial cable, USB cable, Bluetooth link or infrared link) and does not depend on whether a mobile phone or GSM/GPRS modem is used (i.e. the SMS sending rate is about the same no matter a mobile phone or a GSM/GPRS modem is used). The determining factor for the SMS sending rate is the wireless network.

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What is an SMS Gateway? - Tutorial(9)

2008-02-01T16:43:00.000-08:00

One problem of SMS messaging is that SMSCs developed by different companies use their own communication protocol and most of these protocols are proprietary. For example, Nokia has an SMSC protocol called CIMD whereas another SMSC vendor, CMG, has an SMSC protocol called EMI. We cannot connect two SMSCs if they do not support a common SMSC protocol. To deal with this problem, an SMS gateway is placed between two SMSCs. This is illustrated in the following figure. The SMS gateway acts as a relay between the two SMSCs. It translates one SMSC protocol to another one. This way can be used by two different wireless carriers to interconnect their SMSCs for purposes such as enabling the exchange of inter-operator SMS messages.

Figure 1. An SMS gateway acts as a relay between two SMS centers.

Besides wireless carriers, content providers and SMS application developers may also find an SMS gateway useful. Let's consider the following situation. Suppose you are the developer of an SMS text messaging application. To send and receive SMS text messages on your server, one way is to connect to the SMSCs of the wireless carriers. Different wireless carriers may use SMSCs from different vendors, which means your SMS text messaging application may need to support multiple SMSC-specific protocols. (This is illustrated in the following figure). As a result, the SMS text messaging application's complexity and development time increases.

Figure 2. An SMS text messaging application connects to SMSCs without an SMS gateway.

To deal with the above problem, an SMS gateway can be set up to handle the connections to the SMSCs. Now the SMS text messaging application only needs to know how to connect to the SMS gateway. To support more SMSCs, you just need to modify the settings of the SMS gateway. No change to the source code of the SMS text messaging application is required. The use of an SMS gateway can greatly shorten the SMS text messaging application's development time.

To connect to an SMS gateway, you can use an SMSC protocol such as SMPP and CIMD. Some SMS gateways support an HTTP / HTTPS interface. HTTP / HTTPS is easier to use than SMSC protocols. The drawback is that there may be fewer SMS features to use. For example, an SMS gateway may not support the sending of picture messages through the HTTP / HTTPS interface.

Figure 3. An SMS text messaging application connects to SMSCs through an SMS gateway.

Besides using a direct connection to the SMSC of a wireless carrier, another way to send and receive SMS text messages on a computer is to use a mobile phone or GSM/GPRS modem. To do this, your SMS text messaging application has to know how to communicate with the mobile phone or GSM/GPRS modem using AT commands.

Some SMS gateways are capable of handling the connections to mobile phones and GSM/GPRS modems. To send and receive SMS text messages with a mobile phone or GSM/GPRS modem, the SMS text messaging application only needs to know how to talk to the SMS gateway and does not need to know anything about AT commands. More details about GSM/GPRS modems and AT commands will be provided in later sections of this SMS tutorial.

Figure 4. An SMS text messaging application connects to a pool of mobile phones or GSM/GPRS modems through an SMS gateway.

Open Source and Free SMS Gateway Software

As you can see in the above sections, an SMS gateway has a lot of responsibilities in an SMS messaging system. So, SMS gateway software can be very complex and complex software is usually expensive. Fortunately, there are open source SMS gateway software packages that can be downloaded free of charge over the web. One high-quality free SMS gateway software package is Kannel, which is written in the C programming language. Kannel can handle connections to SMSCs, mobile phones and GSM/GPRS modems. It has an HTTP / HTTPS interface for the sending and receiving of SMS messages. More information about Kannel can be found on its web site http://www.kannel.org/.

from developershome .com

International SMS Messages - Tutorial(8)

2008-02-01T16:38:00.000-08:00

Inter-operator SMS messages can be further divided into two categories -- local inter-operator SMS messages and international inter-operator SMS messages (international SMS messages). A local inter-operator SMS message is an SMS message that is sent from one wireless network operator to another wireless network operator in the same country, while an international SMS message is an SMS message that is sent from a wireless network operator in one country to a wireless network operator in another country.

Usually the cost for sending an international SMS message from a mobile phone is higher than that for sending a local inter-operator SMS message. Hence, the cost for sending an intra-operator SMS message <= the cost for sending a local inter-operator SMS message <= the cost for sending an international SMS message.

The interoperability of SMS messaging between two wireless networks locally and even internationally is undoubtedly a main factor that contributes to the success of SMS worldwide.

from developershome .com

Inter-operator SMS Messages - Tutorial(7)

2008-02-01T16:36:00.000-08:00

Suppose you and your friend are using the mobile phone service of wireless network operator A and wireless network operator B respectively. The transmission of an SMS message from you to your friend involves two wireless networks. This SMS message is called an inter-operator SMS message.

Typically, the cost for sending an inter-operator SMS message from a mobile phone is higher than that for sending an intra-operator SMS message.

Transmission Process of Inter-operator SMS Messages

The transmission of an inter-operator SMS message involves one or more SMS centers. Generally, there are two different ways for the transmission of inter-operator SMS messages. In the first way, signaling interconnections are set up between two wireless networks. When the originator SMS center receives an inter-operator SMS message, it gets the routing information from the recipient wireless network and delivers the SMS message to the recipient mobile phone directly. The following figure illustrates the transmission process:

The first way can be used if the two wireless networks involved in the transmission of the inter-operator SMS message are based on similar technologies. However, if this is not true, the second way has to be used. For example, when an SMS message is sent from a GSM network to a CDMA network. In the second way, the originator SMS center and the recipient SMS center are interconnected through an SMS gateway or with a communication protocol that is supported by both SMS centers. The SMS message first reaches the originator SMS center, which will then forward the SMS message towards the recipient SMS center. The recipient SMS center will be responsible for sending the SMS message to the recipient mobile phone and storing the SMS message if the recipient mobile phone is offline. The following figure illustrates the transmission process:

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Intra-operator SMS Messages - Tutorial(6)

2008-02-01T16:25:00.000-08:00

If both you and your friend are using the mobile phone service of the same wireless network operator, the transmission of an SMS message from you to your friend will involve only one wireless network operator. This SMS message is called an intra-operator SMS message.

Typically, the cost for sending an intra-operator SMS message from a mobile phone is lower than that for sending other kinds of SMS messages such as inter-operator SMS messages. Some wireless network operators allow their subscribers to send unlimited intra-operator SMS messages free of charge.

Transmission Process of Intra-operator SMS Messages

The transmission of an intra-operator SMS message involves only one SMS center. After leaving the sender, the intra-operator SMS message reaches the SMS center. The SMS center then delivers the SMS message to the recipient mobile phone. If the recipient mobile phone is offline, the SMS center stores the SMS message. It will deliver the SMS message when the recipient mobile phone is online. If the SMS message's validity period expires and the recipient mobile phone is still offline, the SMS center will remove the SMS message.

When the SMS center receives the message delivery report from the recipient mobile phone or removes the SMS message (for example, when the validity period expires), it sends a status report to the sender if the sender requested one earlier.

The following figure illustrates the transmission process of an intra-operator SMS message:

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Basic Concepts of SMS Technology - Tutorial(5)

2008-01-19T15:54:00.000-08:00

In the following sections, we will introduce to you some basic concepts of the SMS technology.

Validity Period of an SMS Message

An SMS message is stored temporarily in the SMS center if the recipient mobile phone is offline. It is possible to specify the period after which the SMS message will be deleted from the SMS center so that the SMS message will not be forwarded to the recipient mobile phone when it becomes online. This period is called the validity period.

Here is an example that illustrates how validity period can be used. Suppose you find a very interesting program that is showing on TV now. You think your friend may want to watch it. So, you send a text message to tell your friend about the TV program. Let's say the TV program lasts for an hour. Your SMS text message will not be useful to your friend if his mobile phone is not available before the program finishes. In this situation, you may want to send a text message with a validity period of one hour to your friend. The wireless carrier will not deliver the SMS text message to your friend if his mobile phone is not available before the validity period ends.

A mobile phone should have a menu option that can be used to set the validity period. After setting it, the mobile phone will include the validity period in the outbound SMS messages automatically.

Message Status Reports

Sometimes you may want to know whether an SMS message has reached the recipient mobile phone successfully. To get this information, you need to set a flag in the SMS message to notify the SMS center that you want a status report about the delivery of this SMS message. The status report is sent to you in the form of an SMS message.

A mobile phone should have a menu option that can be used to set whether the status report feature is on or off. After setting it, the mobile phone will set the corresponding flag in the outbound SMS messages for you automatically. The status report feature is turned off by default on most mobile phones and GSM / GPRS modems.

Message Submission Reports

After leaving the mobile phone, an SMS message goes to the SMS center. When it reaches the SMS center, the SMS center will send back a message submission report to the mobile phone to inform whether there are any errors or failures (e.g. incorrect SMS message format, busy SMS center, etc). If there is no error or failure, the SMS center sends back a positive submission report to the mobile phone. Otherwise it sends back a negative submission report to the mobile phone. The mobile phone may then notify the user that the message submission was failed and what caused the failure.

If the mobile phone does not receive the message submission report after a period of time, it concludes that the message submission report has been lost. The mobile phone may then re-send the SMS message to the SMS center. A flag will be set in the new SMS message to inform the SMS center that this SMS message has been sent before. If the previous message submission was successful, the SMS center will ignore the new SMS message but send back a message submission report to the mobile phone. This mechanism prevents the sending of the same SMS message to the recipient multiple times.

Sometimes the message submission report mechanism is not used and the acknowledgement of message submission is done in a lower layer.

Message Delivery Reports

After receiving an SMS message, the recipient mobile phone will send back a message delivery report to the SMS center to inform whether there are any errors or failures (example causes: unsupported SMS message format, not enough storage space, etc). This process is transparent to the mobile user. If there is no error or failure, the recipient mobile phone sends back a positive delivery report to the SMS center. Otherwise it sends back a negative delivery report to the SMS center.

If the sender requested a status report earlier, the SMS center sends a status report to the sender when it receives the message delivery report from the recipient.

If the SMS center does not receive the message delivery report after a period of time, it concludes that the message delivery report has been lost. The SMS center then re-sends the SMS message to the recipient.

Sometimes the message delivery report mechanism is not used and the acknowledgement of message delivery is done in a lower layer.

from developershome .com

All I wanted , Don't go for looks, As days go by - Romantic SMS

2008-01-19T15:01:00.000-08:00

All I wanted was sum1 2 care 4 me
All I wanted was sum1 who'd b there 4 me
All I ever wanted was sum1 who'd b true
All I ever wantedwas sum1 like U...
(Characters: 153)

Don't go for looks,
they can deceive
Don't go for wealth
even that fades away.

Go for sum1 who makes u
smile becoz only a smile makes
a dark day seem bright..
(Characters: 166)

As days go by, my feelings get stronger,
To be in ur arms, I can't wait any longer.
Look into my eyes & u'll see that it's true,
Day & Night my thought r of U..
(Characters: 163)

What is an SMS Center / SMSC? - Tutorial(4)

2008-01-18T15:43:00.000-08:00

An SMS center (SMSC) is responsible for handling the SMS operations of a wireless network. When an SMS message is sent from a mobile phone, it will reach an SMS center first. The SMS center then forwards the SMS message towards the destination. An SMS message may need to pass through more than one network entity (e.g. SMSC and SMS gateway) before reaching the destination. The main duty of an SMSC is to route SMS messages and regulate the process. If the recipient is unavailable (for example, when the mobile phone is switched off), the SMSC will store the SMS message. It will forward the SMS message when the recipient is available.

Very often an SMSC is dedicated to handle the SMS traffic of one wireless network. A network operator usually manages its own SMSC(s) and locates them inside its wireless network system. However, it is possible for a network operator to use a third-party SMSC that is located outside the wireless network system.

You must know the address of the wireless network operator's SMSC in order to use SMS messaging with your mobile phone. Typically an SMSC address is an ordinary phone number in the international format. A mobile phone should have a menu option that can be used to configure the SMSC address. Normally, the SMSC address is pre-set in the SIM card by the wireless network operator, which means you do not need to make any changes to it.

from developershome .com

C.L.I.C.K. means, No shadows 2 depress u, Smile in Pleasure - Romantic SMS

2008-01-18T14:51:00.000-08:00

C.L.I.C.K. means :

C= cant live without u
L= love u
I= i miss u
C= care about u
K= kiss from my heart 2 u
So whenever u miss me just say CLICK.
(Characters: 151)

No shadows 2 depress u
only joys 2 surround u
many friends 2 luv u
God himself 2 bless u
These r my wishes 4 u,
for today, tommorrow & everyday
(Characters: 150)

Smile in Pleasure
Smile in Pain
Smile when trouble pours like Rain
Smile when sum1 Hurts U
Smile becoz SOMEONE still
Loves to see u Smiling!!
(Characters: 147)

Luv meanz.., If i reached for your hand, If Your asking - Romantic SMS

2008-01-17T14:12:00.000-08:00

Luv meanz to see someone with closed eyez,
to miss some1 in crowd,
2 find some1 in every thought,
to live 4 some1, luv some1, but sure tht sum1 is ONLY one!
(Characters: 160)

If i reached for your hand , will u hold it ?
If i hold out my arms, will u hug me ?
If i go for your lips, will u kiss me ?
If i capture ur heart , will u love me ??
(Characters: 170)

If Your asking if I Need U the answer is 4Ever..
If Your askin if I'll Leave U the answer is Never..
If Your askin what I value the Answer is U..
if Your askin if I love U the answer is I do.
(Characters: 198)

Jail, Not much,50/50 - Funny SMS

2008-01-16T18:19:00.000-08:00

In a train, ticket checker to a saint: Ticket please!
Saint: I don't have.
TT: Where do you want to go?
Saint: Lord Ram's birth place, Ayodhya!
TT: Come, lets go!
Saint: Where?
TT: Lord Krishna'a birth place, Jail.
(Characters: 220)

Dad : Son, what do you want for your birthday?
Son : Not much dad, just a radio with a sports car around it.
(Characters: 110)

A Love Letter from BISCUIT MAKER- Dear Marie, Today is Good Day, U r Anmol for me... But U have Crackjacked my Heart, Bcoz I have a Little Heart, Now I m in 50/50 position...
(Characters: 174)

Example Applications of SMS Messaging - Tutorial(3)

2008-01-16T15:29:00.000-08:00

There are many different kinds of SMS applications on the market today and many others are being developed. Applications in which SMS messaging can be utilized are virtually unlimited. We will describe some common examples of SMS applications below to give you some ideas of what can be done with SMS messaging.

Person-to-Person Text Messaging

Person-to-person text messaging is the most commonly used SMS application and it is what the SMS technology was originally designed for. In these kinds of text messaging applications, a mobile user types an SMS text message using the keypad of his/her mobile phone, then he/she inputs the mobile phone number of the recipient and clicks a certain option on the screen, such as "Send" or "OK", to send the text message out. When the recipient mobile phone receives the SMS text message, it will notify the user by giving out a sound or vibrating. The user can read the SMS text message some time later or immediately and can send a text message back if he/she wants.

A chat application is another kind of person-to-person text messaging application that allows a group of people to exchange SMS text messages interactively. In a chat application, all SMS text messages sent and received are displayed on the mobile phone's screen in order of date and time. SMS text messages written by different mobile users may be displayed in different colors for better readability, like this:

Me:
Let's have a meeting at 10 am tomorrow to discuss the details of
our next SMS text messaging application.

Tom:
OK.

Alan:
I have another meeting at 10 am. I suggest having the meeting at
11:30 am tomorrow. What do you think?

Provision of Information

A popular application of the SMS technology other than person-to-person text messaging is the provision of information to mobile users. Many content providers make use of SMS text messages to send information such as news, weather report and financial data to their subscribers. Many of these information services are not free. Reverse billing SMS is a common way used by content providers to bill their users. The user is charged a certain fee for each reverse billing SMS message received. The fee will either be included in the monthly mobile phone bill or be deducted from prepaid card credits.

Downloading

SMS messages can carry binary data and so SMS can be used as the transport medium of wireless downloads. Objects such as ringtones, wallpapers, pictures and operator logos can be encoded in one or more SMS messages depending on the object's size. Like information services, wireless download services are usually not free and reverse billing SMS is a common way used by content providers to bill their customers. The object to be downloaded is encoded in one or more reverse billing SMS messages. The mobile user who requests the object will be charged a certain fee for each reverse billing SMS message received. If the mobile user is using a monthly mobile phone service plan, the download fee will be included in his/her next monthly bill; if the mobile user is using a prepaid SIM card, the download fee will be deducted from the prepaid credits.

Alerts and Notifications

SMS is a very suitable technology for delivering alerts and notifications of important events. This is because of two reasons:

A mobile phone is a device that is carried by its owner most of the time. Whenever an SMS text message is received, the mobile phone will notify you by giving out a sound or by vibrating. You can check what the SMS text message contains immediately.
SMS technology allows the "push" of information. This is different from the "pull" model where a device has to poll the server regularly in order to check whether there is any new information. The "pull" model is less suitable for alert and notification applications, since it wastes bandwidth and increases server load.

Some common examples of SMS alert and notification applications are described below.

Email, Fax and Voice Message Notifications

In an email notification system, a server sends a text message to the user's mobile phone whenever an email arrives at the inbox. The SMS text message can include the sender's email address, the subject and the first few lines of the email body. An email notification system may allow the user to customize various filters so that an SMS alert is sent only if the email message contains certain keywords or if the email sender is an important person. The use cases for fax or voice message are similar.

E-commerce and Credit Card Transaction Alerts

Whenever an e-commerce or credit card transaction is made, the server sends a text message to the user's mobile phone. The user can know immediately whether any unauthorized transactions have been made.

Stock Market Alerts

In a stock market alert application, a program is constantly monitoring and analyzing the stock market. If a certain condition is satisfied, the program will send a text message to the user's mobile phone to notify him/her of the situation. For example, you can configure the alert system such that if the stock price of a company is lower than a certain value or drops by a certain percentage, it will send an SMS alert to you.

Remote System Monitoring

In a remote system monitoring application, a program (sometimes with the help of a group of sensors) is constantly monitoring the status of a remote system. If a certain condition is satisfied, the program will send a text message to the system administrator to notify him/her of the situation. For example, a program may be written to "ping" a server regularly. If no response is received from the server, the program can send an SMS alert to the system administrator to notify him/her that the server may be hanged.

Two-way Interactive Text Messaging Applications

SMS messaging technology can be used as the underlying communication medium between wireless devices and servers in a two-way interactive text messaging application. For example, search engines are two-way interactive text messaging applications. Let's say there is a dictionary search engine that supports queries in SMS text messages. It may operate like this:

To find out the meaning of the term "SMS text messaging", you can type "find: SMS text messaging" in an SMS text message and send it to the search engine's phone number. After receiving your SMS text message, the search engine parses it and finds that it begins with the command "find" and follows by the words "SMS text messaging". The search engine then knows you want to find out the meaning of the term "SMS text messaging". So, it sends a text message, which contains the meaning of the term "SMS text messaging", back to your mobile phone.
If the search result is very long and it cannot contain within a single SMS text message, the search engine adds "Page 1 of 2", "Page 1 of 3", etc, at the end of the reply SMS text message. The search engine also creates a session using your mobile phone number as the session ID and stores the term that you searched for (i.e. "SMS text messaging") in the session object.
To request the second page, you can send a text message with the content "page: 2" to the search engine's phone number. After receiving your SMS text message, the search engine parses it and finds that it begins with the command "page" and follows by "2". The search engine then knows you want the second page of the search result. It retrieves the term that you searched for last time from the session object and finds that it is "SMS text messaging". The search engine then sends a text message that contains the second page of the search result for the term "SMS text messaging" back to your mobile phone.

Many other two-way interactive text messaging applications can be built using a similar way. For example, a company may want to build an SMS messaging application to enable its employees to query the corporate database while they are working outdoors.

SMS Marketing

SMS messaging can be used as a marketing tool. An example is an SMS newsletter system. After signing up, the user will receive SMS text messages about the latest discounts and products of the company. If the user has any questions or comments, he/she can send a text message back with the questions or comments in it. The company may include its phone number in the SMS newsletter so that the user can talk to the customer service staff directly if he/she wants to do so.

from developershome .com

What Makes SMS Messaging So Successful Worldwide? - Tutorial(2)

2008-01-16T14:40:00.000-08:00

SMS is a success all over the world. The number of SMS messages exchanged every day is enormous. SMS messaging is now one of the most important revenue sources of wireless carriers. What is so special about SMS that makes it so popular worldwide? Some of the reasons are discussed below.

SMS Messages can be Sent and Read at Any Time

Nowadays, almost every person has a mobile phone and carries it most of the time. With a mobile phone, you can send and read SMS messages at any time, no matter you are in your office, on a bus or at home.

SMS Messages can be Sent to an Offline Mobile Phone

Unlike a phone call, you can send an SMS message to your friend even when he/she has not switched on the mobile phone or when he/she is in a place where the wireless signal is temporarily unavailable. The SMS system of the mobile network operator will store the SMS message and later send it to your friend when his/her mobile phone is online.

SMS Messaging is Less Disturbing While You can Still Stay in Touch

Unlike a phone call, you do not need to read or reply an SMS message immediately. Besides, writing and reading SMS messages do not make any noise. While you have to run out of a theater or library to answer a phone call, you do not need to do so if SMS messaging is used.

SMS Messages are Supported by 100% GSM Mobile Phones and They can be Exchanged between Different Wireless Carriers

SMS messaging is a very mature technology. All GSM mobile phones support it. Not only that you can exchange SMS messages with mobile users of the same wireless carrier, but you can also exchange SMS messages with mobile users of many other wireless carriers worldwide.

SMS is a Suitable Technology for Wireless Applications to Build on

Here are some of the reasons that make SMS a suitable technology for wireless applications to build on:

Firstly, SMS messaging is supported by 100% GSM mobile phones. Building wireless applications on top of the SMS technology can maximize the potential user base.
Secondly, SMS messages are capable of carrying binary data besides text. They can be used to transfer ringtones, pictures, operator logos, wallpapers, animations, VCards, VCals (calendar entries), etc.
Thirdly, SMS supports reverse billing, which enables payment to be made conveniently. For example, suppose you want to develop a commercial ringtone download application that charges a fee from the user for each ringtone downloaded. One way to accept payment is to use a reverse billing phone number obtained from a wireless carrier. To buy a ringtone, the user will write an ordinary SMS text message that contains the ID of the ringtone he/she wants to buy and send it to your SMS application's reverse billing phone number. Your SMS application will then send back one or more reverse billing SMS messages that carry the ringtone. The user will be charged a fee for the reverse billing SMS messages he/she received. The fee will be included in the user's monthly mobile phone bill or be deducted from his/her prepaid card credits. Depending on the agreement between you and the wireless carrier, all or part of the money received will be given to you.

from developershome .com

Wen things go wrong.., I dream about you, When i look at you - Romantic SMS

2008-01-16T14:08:00.000-08:00

Wen things go wrong...
Wen sadness fills ur heart...
wen tears flow in ur eyes...
always remember 3 things
1) I'm with u...
2) Still with u...
3) Will ALWAYS b...
(Characters: 168)

I dream about you evey night
I shiver when your in sight
I long to hold you close n tight
I wanna be there with all my might
I m just hoping I'm the girl whos right
(Characters: 174)

When i look at you,
i cannot deny there is God,
cause only God could have created some one
as wonderful n beautiful as you
(Characters: 127)

Introduction to SMS Messaging - Tutorial (1)

2008-01-15T13:04:00.000-08:00

What is SMS (Short Message Service)?

SMS stands for Short Message Service. It is a technology that enables the sending and receiving of messages between mobile phones. SMS first appeared in Europe in 1992. It was included in the GSM (Global System for Mobile Communications) standards right at the beginning. Later it was ported to wireless technologies like CDMA and TDMA. The GSM and SMS standards were originally developed by ETSI. ETSI is the abbreviation for European Telecommunications Standards Institute. Now the 3GPP (Third Generation Partnership Project) is responsible for the development and maintenance of the GSM and SMS standards.

As suggested by the name "Short Message Service", the data that can be held by an SMS message is very limited. One SMS message can contain at most 140 bytes (1120 bits) of data, so one SMS message can contain up to:

160 characters if 7-bit character encoding is used. (7-bit character encoding is suitable for encoding Latin characters like English alphabets.)
70 characters if 16-bit Unicode UCS2 character encoding is used. (SMS text messages containing non-Latin characters like Chinese characters should use 16-bit character encoding.)

SMS text messaging supports languages internationally. It works fine with all languages supported by Unicode, including Arabic, Chinese, Japanese and Korean.

Besides text, SMS messages can also carry binary data. It is possible to send ringtones, pictures, operator logos, wallpapers, animations, business cards (e.g. VCards) and WAP configurations to a mobile phone with SMS messages.

One major advantage of SMS is that it is supported by 100% GSM mobile phones. Almost all subscription plans provided by wireless carriers include inexpensive SMS messaging service. Unlike SMS, mobile technologies such as WAP and mobile Java are not supported on many old mobile phone models.

Concatenated SMS Messages / Long SMS Messages

One drawback of the SMS technology is that one SMS message can only carry a very limited amount of data. To overcome this drawback, an extension called concatenated SMS (also known as long SMS) was developed. A concatenated SMS text message can contain more than 160 English characters. Concatenated SMS works like this: The sender's mobile phone breaks down a long message into smaller parts and sends each of them as a single SMS message. When these SMS messages reach the destination, the recipient mobile phone will combine them back to one long message.

The drawback of concatenated SMS is that it is less widely supported than SMS on wireless devices.

EMS (Enhanced Messaging Service)

Besides the data size limitation, SMS has another major drawback -- an SMS message cannot include rich-media content such as pictures, animations and melodies. EMS (Enhanced Messaging Service) was developed in response to this. It is an application-level extension of SMS. An EMS message can include pictures, animations and melodies. Also, the formatting of the text inside an EMS message is changeable. For example, the message sender can specify whether the text in an EMS message should be displayed in bold or italic, with a large font or a small font.

The drawback of EMS is that it is less widely supported than SMS on wireless devices. Also, many EMS-enabled wireless devices only support a subset of the features defined in the EMS specification. A certain EMS feature may be supported on one wireless device but not on the other.

from developershome .com

What are the components of an SMS message?

2008-01-15T12:43:00.000-08:00

The actual text of the SMS message isn't the only thing that's being transmitted. Here are the elements of a complete SMS transaction:

Header: identifies the type of message.
Service Center Timestamp
Originator Address: the phone number of the sender
Protocol Identifier
Data Coding Scheme
User Data Length: tells how long the message is
User Data: the message itself (140 bytes: 160 7-bit characters, or 140 8-bit characters)

You won't see any of these components except the User Data (the message itself).

When you send an SMS to an email address, the message is still sent to the SMS Email center, but then it is relayed to the email server of the recipient. The recipient's email address is actually embedded in the User Data portion of the message, transparently on a Treo, or manually on a VisorPhone.

7-bit vs. 8-bit messaging
Currently, most North American wireless service providers support the 7-bit alphabet. Some providers support 8-bit messaging, which enables people to send small image files with a message. If you are receiving garbled strings of text as SMS messages, someone is probably trying to send you an 8-bit message with an image or ringtone, and your wireless service provider only supports 7-bit messaging.

Dinosaurs and Decent Girls, Brush ur Teeth,Great Sunday - Funny SMS

2008-01-14T18:15:00.000-08:00

Do u know similarity between Dinosaurs and Decent Girls?
Both don't exist.
(Characters: 75)

Dream makes everything possible, Hope makes everything work, Luv makes everything beautiful, Smile makes all the above... So always Brush ur Teeth
(Characters: 146)

Monday went on Tuesday 2 Wednesday and asked Thursday whether Friday has told Saturday that Sunday is a holiday. Have a Great Sunday...
(Characters: 135)

Love isn't a decision, 24hrs make a lovely day, Don't wait - Romantic SMS

2008-01-14T13:48:00.000-08:00

Love isn't a decision, it's a feeling. If we could decide who to love, then, life would be much simpler, but then less magical.
(Characters: 127)

24hrs make a lovely day,
7 days make a lovely week,
52 weeks make a lovely year & knowing a
person like me will make ur life lovely.

Have a lovely day n life!**
(Characters: 167)

Don't wait until it's too late to tell someone how much you love, how much you care. Because when they're gone, no matter how loud you shout and cry, they won't hear you anymore.
(Characters: 178)

Free SMS Service (2)

2008-01-14T12:21:00.000-08:00

The service used jayashricombine .com service

How SMS works ?

2008-01-13T11:22:00.000-08:00

SMS works on a store-and-forward basis. Instead of being sent directly to the recipient, SMS messages travel through several important nodes before reaching the recipient.

The SMS message is submitted to your wireless service provider's SMS Center.
After the message is processed internally, the SMS Center sends a request to the Home Location Register (HLR) and receives the routing information for the recipient.
The SMS Center sends the message to the Mobile Switching Center (MSC).
The MSC collects the recipient's information from the Visitor Location Register (VLR) and, sometimes, proceeds with an authentication operation.
The MSC forwards the message to a Mobile Server.
If the recipient has a Treo or VisorPhone, the SMS is placed on the SIM card until the handheld picks up the message and transfers it to the internal memory on the unit.

This is how Treos and VisorPhones can store hundreds of SMS messages, unlike ordinary GSM mobile phones that store only a few SMS messages.

Treo or VisorPhone owners may encounter the error message "Your SIM contains at least one SMS message. Do you want to move the message to your Visor?"
The MSC returns the outcome of the Forward Short operation to the SMS Center.
The SMS Center reports delivery status of the short message back to the sender.

Rohit, Mosquito, Cartoonist - Funny SMS

2008-01-12T18:09:00.000-08:00

Boy: I am not rich like rohit, I don't even have a bid car like rohit. But I really love you!
Girl: I love you too, but tell me more about rohit..
(Characters: 147)

Can v do romance in the evening today?

I'm in a good mood
Just a little bit of kissing and biting

reply me soon!

urs lovingly

"MOSQUITO"
(Characters: 149)

If I was an artist,
you would be my picture!
If I was a poet,
you would be my inspiration!
If I was an author you would be my story!

But I'm only a cartoonist!
(Characters: 166)

What is SMS ?

2008-01-12T06:11:00.000-08:00

Short Message Service (SMS) is a communications protocol allowing the interchange of short text messages between mobile telephony devices. The SMS technology has facilitated the development and growth of text messaging. The connection between the phenomenon of text messaging and the underlying technology is so great that in parts of the world the term "SMS" is used colloquially as a synonym for a text message from another person or the act of sending a text message.

SMS as used on modern handsets was originally defined as part of the GSM series of standards in 1985 as a means of sending messages of up to 160 characters, to and from GSM mobile handsets. Since then, support for the service has expanded to include alternative mobile standards such as ANSI CDMA networks and Digital AMPS, as well as satellite and landline networks. Most SMS messages are mobile-to-mobile text messages, though the standard supports other types of broadcast messaging as well.

From Wikipedia, the free encyclopedia

Free SMS Service (1)

2008-01-11T06:02:00.000-08:00

The service is supported by www.email2sms.ru

Funny SMS Contents

2008-01-01T18:24:00.000-08:00

Romantic SMS Contents

2008-01-01T17:53:00.000-08:00

Free SMS Submit

2008-01-01T17:41:00.000-08:00

SMS Tutorials for Developers - Step By Step

2008-01-01T16:27:00.000-08:00

SMS Basic

2008-01-01T16:21:00.000-08:00