Hi,guys i need help i have g502 phone and i updated its firmware to R1FA037 + flash theme + Sound Acoustic then i called some friend on my phone and the problem is that i can hear him but he can't hear me can someone tell me what to do or fix

I think its from the acoustic but there is nothing wrong with it

Its to do with the call acoustics: you need to replace them with the originals. Its a common problem accorded when modding acoustics

ty man i installed new ones and its working fine now