I recieved a krazor from att about a year ago. Few mohths later I travelled outside the US, to make work on carrier other than ATT I payed some guy to unlock the phone. $40 later, my phone worked for the first few hours than had problems hearing and recieving calls. When I brought the phone back to the US and put att sim back in, it did the same thing, work for a little bit than just get worse and worse. Sounds like a hardware issue, but the phone was 100% before i had it unlocked. If all i have to do is flash it or restore its orginal firmware, how do i do that?
you can download the stock ATT firmware from here. if this doesn't resolve the issue you can try replacing the audio_config.db file which controls all the sound settings as yours may have become corrupt somehow. read the thread here and try replacing that file first. it may solve the problem without having to reflash it. i have the modified audio_config.db file from that thread on my phone and it's VERY loud
oooooooooooo unlocked black K1, RSA removed, DUAL BOOT R452F_G_08.03.08R, GSTCNRYRVFLIGB07A