So I know somone who was jailbroken and unlocked on 3.1.2, but he did a reset all settings and content, and it put in him a reboot loop, so the phone wont start. So, I'm trying to find out if there is anyway to restore the iphone to 3.1.2, without losing the unlock. His SHSH are saved on cydia. I am with AT&T so when I upgraded to 3.1.3, and downgraded to 3.1.2 I didnt need an unlock. So I think the process would be different, right? Or is it as easy as doing a shift+restore through iTunes with the modded Hosts file? Or will that mess with any of the unlock?