I was having trouble with my signal, so i decided to reboot my phone to see if the signal improved. I was working on something so i left my phone on the table a couple of minutes. When i came back my phone was asking me for the pin of the sim. I tried to enter it, but the touchscreen wasn't working. I thought maybe it was frozen or something. Then i tried to power off with the menu that comes up when you press the lock button, but again, it wasn't working. I have done soft reset, and hard reset so far, it is like factory new now, but again, touchscreen isn't working. I know the digitizer is broken and i must change it, but does someone knows what the **** happened?