Was at the Apple store. The apple guy couldn't turn on the phone out of the box, said it was a low battery, but managed to turn it on after a short charge with usb cord. So I just got home, try to turn it on, but it does not turn on! I have no phone! Plugged it in for five minutes through usb, nothing, nada black screen no nothing. What is the problem? It worked a hour ago after some juice woke it up! I saw the screen!