Hello, This is my first post on this forum and It's my first day using android OS. I bought the Galaxy S II 6 hours ago and I just came back home and plugged the device on the wall outlet charger, It charges just fine but I can't use the phone! the screen isn't responsive unless I unplug the charge! I'm using the latest firmware and installed few apps. any idea what's going on? thanks in advance P.S.: Is ok that the phone reboot itself from time to time?