I am going to develop an android app on mobile phone or tablet with GSM, that would be: Step 1: When device receiving GSM SMS trigger an event of server. Step 2: Server gets content of SMS and sender's phone number. It will carried out some computing like decryption. Step 3: Server POST a HTTP request to a Web Service.
It will be used as a SMS register server.
Is it possible? Any problem I will meet?