The girlfriend is in London and wants to take her iPhone 4S to O2 and grab a bring your own phone plan, but her iPhone needs to be unlocked first. I dont want to jailbreak, she doesnt need it at all, and I dont want to void the warranty. What is the current safest/easiest/recommended iPhone 4S unlocker? All the research Ive done pointed to programs that unlocked and jailbreak at the same time it seems, and most want money for the software when I know there are free solutions. Im happy to pay I guess if for some reason a certain software is safer, but any recommendations would be appreciated.