Basically at random times when i try to turn up or down the volume the phone won't let me. Its almost like volume is disabled. I thought it could be an app or the recent firmware update but it seems like that ins't the problem. The only way i can get my volume to work is by rebooting my phone. Then i can adjust the volume for a few hours, until it happens again. I've had this problem for about a week now and its extremely annoying. I apologize if this is not in the correct category.