Hey, I was just going through my address book and suddenly a backlighted dark gray fullscreen appeared and the phone started to reboot, but never succesfully booted. It gets stuck at the apple logo, then the spinning loading circle, and sometimes they are shown overlaid. I've been running 3.0 since some time now, and since i'm not very keen at jailbreaking/unlocking I never really bothered to update it. I read that i should restore and update it to the latest software (4.1) but the phone is locked and I can't afford to wait for the unlock, this being my only phone.. I want to update it to 3.1.3, could anyone explain how can I do this, because through iTunes I can update only to the latest software. And also point me in the right direction for a simple restoring guide, thank you!