Software to send SMS text messages

Avg Bid (USD)
Project Budget (USD)
$750 - $1500

Project Description:
I'm interested in developing a software that can send SMS text messages to any mobile phone number regardless of the carrier. The application will only receive two inputs: the mobile phone number and the text message that will be sent to this number.

The application must be done in .Net and use SQL Server as database. We will develop the user interface for the product; we only need the engine to send the text message.

I am not certain if this detail is important, but it will only function with the mobile carriers in my country.

The company that will work on the project must have prior experience with wireless/SMS technology. Use of existing technologies (ie. Use of another site that sends SMS messages) will not be accepted. Use of other dependent services that charge me for each message sent will not be accepted. This must be a stand-alone application/class.

I need to know what technology/gateway will be used to send SMS to phone.

A simple demo will be helpful so that I know that we're understanding each other. It doesn't need to be complex. I just want to make certain that a cellphone number will receive a text message.

Thank you,

Skills required:
.NET, Wireless
About the employer:
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