Android app rebuild (SMS send option)

Hello, I have android app - mp3 search engine. It has been removed from google store so I need now: - change app package name from com.blah..... to something else - create new key for app, compile new version and sign it - remove admob code from app - block ability to turn off app - when user exits app is must still working in background (app can be disabled only by process kill or uninstall) - when user 'exits' app playing mp3 must be stopped - it is made somewere in code so you must only copy and paste Next part is adding ability to send SMS messages by app - I want to make mobile payments for app usage. App should work like this: - when user starts installed app first it connects to my server sending: (data must be sent after accepting terms and conditions of app at first run) - user phone number - user country - user phone operator code - list of installed apps for phone - as return my server will send - XXX digit - for example 123 (minutes) so app will make another request to my website after 123 minutes ( as response there can be again diffirent time returned) - optionally where will be returned: - phone number (where to send sms) - sms text (message for sms) - 'remove pattern' - explained below After sending SMS, app must remove it form 'sent' directory from phone. App must also listen for incoming SMS messages and if in recived sms there is word same as in 'remove pattern' it must remove this message Please bid if you have experience with SMS sending even if phone is locked, you know that privileges to set when app installing etc. If you have experience with this kind of apps please let me know.