The reason is strange, it seems the microphone isnt working properly. I started out by rooting and installing TWRP then flashing Cyanogenmod 10.2. After my first call the microphone quit working after a few minutes. Strange, I realize but my buddy said I just cut out and that was it. I tried some test calls and sure enough no sound from the mic. I tried flashing a few other roms, a stripped stock rom, Cyanogenmod 11, all had mic issues. WIth CM 11 people say I sound like Im in a truck or a convertible with the top down. Ive tried flashing different radios but nothing seems to help. Now I need to return it to full factory and dont want to screw up and get denied. Anyone have a ROM and a guide? Will willing to go OTA factory to see if it fixes my problem.