Okay so I have a stock Epic and today it has shut down on me without any audible or visual warning. I've had it sitting on my desk while working and when I pick it up to use it I have to turn it on. It seems if it sits idle for about 15 to 20 minutes it just turns off. When I go to turn the screen on it starts the phone up like it has been off. This has never happened before so if anyone has any idea of what I should look at I would greatly appreciate it.