I want an SMS auto-responder system. When I receive an SMS, the system would parse the message and shoot back automatically pre-configured replies according to the keyword in the sms. We need this implemented in the following 2 methods:

Method 1:
Desktop software to be designed that works with most mobile devices, GSM Modems, and SMS Gateways.
The software should be similar to the software that can be downloaded at this website: http://riasc.net/market(xxx)sms.aspx (remove the (xxx))
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I want it to have the same features as this software but also with the following added features:
• The software would only work with the IMEI number that is configured in it for some mobile or GSM modem. This way, I would configure the software to work only with some IMEI number for one customer and another IMEI number for another. The software would not be able to work except with the mobile/GSM modem that has the IMEI number it is configured to.
• Supports sending MMS and WAP Push messages.
• Saves all incoming messages along with the date/time and sender's phone number and all this information can be exported to Excel, Access Database, or Text File.
• Software should have a “default” message that would be responded back if the keyword in the message did not match any of the other keywords.
• Software should respond back with the “default” message reply even if the sent message was blank.
• If I get an incoming call, the system should auto-reply to that number with some pre-configured message (special message just for any incoming calls). We should be able to turn OFF this feature.
• Ability to import contacts into the software from Excel, Database, or Text file.
• If I receive an sms with the keyword "unsubscribe" then the system would flag that number. The software should check before sending out any sms and skip sending to any number that is flagged. Also, I should be able to later add back that number and clear the unsubscription flag on that number.
• Works on most Windows platforms (Windows XP, Vista, 7).
• Can support sending messages in different languages (minimum English, French, Spanish and Arabic)

Please specify how you intend to implement the first feature (configuring each software copy to some IMEI number).

Method 2:
The same as Method 1, however, the software should connect with the internet every time it starts up and checks the user's credentials against the database. Then it downloads the number of allowed credits for the user. The number of credits decrements as messages are sent and then software would stop functioning once the user is out of credits. A website interface would be created to allow users to purchase more credits using PayPal.


ONLY BID IF YOU HAVE DEVELOPED A SIMILAR SOFTWARE. A demo of your software shall be greatly helpful in shortlisting you and perhaps choosing you for the job.

More details about the project will be provided at a later point. Later on, we shall develop a web-to-sms.