So, after I access my iPhone after it hasn't been used for a while, there is no sound... I can't hear people on the phone, I can't hear anything that I play under music/video/etc.... Sometimes, it even happens while I use the phone... I can not hear the person I am talking to. I restored the software. I rebooted the device. Doesn't help. It happens again and again. Happen to anybody else? What have you done to stop this?