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SMS Messaging Question

Posted on 2003-11-25
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Last Modified: 2010-04-11
There are a number of operators offering direct SMS text messaging to any cell phone in the world just by providing a full cell phone # and entering in the message.  From what I gather this service is free to send and the recipient pays nothing.  

Is it possible to submit an SMS/EMS/MMS message from my cell phone to my web server which itself can then resubmit the original message to the proper cellphone # as a "free" SMS/EMS/MMS text message?  Does my web server then have to use a different protocol or have to listen on another port?  How does an incoming SMS/EMS/MMS message look?
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Question by:barkin
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chicagoan earned 150 total points
ID: 9817313
http://www.winsms.com/ and www.kannel.org will give you a good foundation in what you're trying to do.
If you're trying to leach from a free web based SMS gateway you'd have to simulate the web session, this sort of http session replay  is a common thing in web testing and http://www.isse.gmu.edu/~wuye/classes/637/lecture/WebTesting.pdf can give you some background there.

First of all, unless you have permission from the host it's not really ethical. These sites are often supported with ads or are labors of love with community forums.

Secondly the operators are very aware of the possiibility of just what you're trying to do and either change their pages subtly and often, use dynamic pages or display an image that contains a code to send the message to thwart leaches.

If your wireless provider has a messaging page, you'd be on a little less shaky ground unless you were reselling or giving unfettered access to the page.

What you could do easily and legally is to use smtp, most phones have an email address, and a WAP page set up to enter some text and the recipient and email it off would be trivial to  construct.

You can get info on the various SMS standards from http://www.openmobilealliance.org/
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