OK, I know there's loads of threads out there, but I've *just* bought an 8gig iPhone and unlocked it (Vodafone UK sim) using these instructions. I'm linking them as they're the simplest and most comprehensive I've found so far. http://hackint0sh.org/forum/showthread.php?t=28612&page=1 Following them to the letter resulted in a fully unlocked iPhone running 1.1.2. Please be aware that: 1. These are not my instructions. I can't help with them 2. They worked for me, they may or may not work for you and your particular model of phone.