Im not sure what happened, one minute I was on Cydia just browsing, the next my phone just shut off and the black apple logo screen came on. It was stuck like that for a few minutes then came back on and said it was in safe mode. Then the same thing happened except this time it just stayed black. Tried hard reset. Didn't work. I tried to restore it and hold down shift to restore and stay on 4.1 several times. Should I just update to 4.2? Is it possible to downgrade back to 4.1? Please help!