ushahidi/SMSSync ? reverse-engineered prompt

Build me an Android app that turns a phone into an SMS gateway.

I want it to let a user connect a phone number, receive incoming SMS messages, and send them on to a web service or backend that can act on them. It should have a simple setup flow, a place to view incoming messages, and basic logs so I can see what happened and troubleshoot if something fails. It would also be helpful to filter messages by phone number and manage a few gateway settings from inside the app.

Please make it feel like a real usable tool, with clean screens, clear status messages, and sensible defaults. If you need to check current Android docs or best practices while building it, go ahead and look them up online.