I just ordered an iPhone 3GS 32GB form Apple UK, it comes on an "O2 pay as you go" deal. However, I already have a Vodafone UK contract and want to use that instead. I just want to unlock the phone, and not jailbreak it. As I've just ordered the phone I have no idea what OS it will be running but I imagine OS 3.0, if not 3.1 I am aware that little or no unlocks exist for 3.1 at the minute, but for the minute lets just say its on 3.0 What software do I need to use? Pwnage tool, ultrasn0w, redsn0w, yell0wsnow? Or, this website that I found, it claims to be able to unlock 3.1 and seems pretty genuine http://www.iphoneunlockuk.com/?gclid=COOsnfGe9pwCFU1_3godWV8vbQ does anybody have any prior experience with this website?