Last night I had my AT&T GS4 charging. I woke up in the middle of the night, and since I am addicted to my phone, decided to check to see if I had any messages. However, my phone had shut completely off in the middle of the night while charging. When I pressed the power I didn't get the green battery either. I unplugged it and held the power down for about 10 seconds and it came back on. Has anyone else had a problem like this? It makes me nervous now since I use my phone as my alarm clock.