help a brotha out

[difrent7]

hey guys i need some help i have a TP on metropcs with juicy 4.10 (had it flashed at a local store). Recent my TP has been giving me some problems first the powerkey on top isn't always turning my screen off and on.. sometimes the only way to get my screen on is by sliding it open. This is a issue but not really a big deal but my second concern is major. It seems as if my mic piece is broken all of a sudden. i havent dropped the phone or had water damange. The microphone doesn't work in phone calls or in voice recorder. I don't know what to do, any tips or advice is greatly appreciated