I solved my problem after taking the camera and speaker back off and resetting the flex ribbon cable. I think the gold contacts weren't making a good connection. I would take a good look at the ribbon cable and be sure you seated it correctly. Maybe clean the gold contacts. And reseat the speaker securely. Every few minutes this iPhone shut off on its own and if you placed a call it would reboot. I'm only assuming that poor placement or dirty contacts are the reason it reboots. Maybe the OS did the reboot to prevent damage if there was a short. I really recommen you take a second look at the ribbon cable and possible poor connection in this area.