Android app and 1 web api modiification

We have an android app which detects incoming and outgoing calls and retrieves details like phone number of caller etc Now this call detector code is executing differently for different Android versions Meaning it is showing null for some phones Or Android versions and not showing null for others 2nd problem) A field named "devic_id" is being sent to server but it is static (value always comes as "a01d"). That just needs to be replaced by one line. Budget is 25$ Start your proposal with abdf. PLEASE IF YOU ARE ASKING FOR MORE BUDGET DONT MAKE A BID.