I bought a used iPhone and it worked great. It was jailbroken. I went home and installed iOS 5, which also should remove jailbreak if I am correct. Then I proceeded to set up iOS 5, where it wouldn't let me activate my iPhone. After 2 hours on the phone with Apple and a trip to the AT&T store, they told me that my used iPhone had Applecare and that they are sending me a new iPhone free of charge. Now that iPhone is on the way, and then I have to send mine to them so they can assess the issue. The confirmation email I received said that if there is any alteration of the OS then all warranty is voided, thus I would have to pay the fee. I cannot afford that fee, so I just want to make sure that the jailbreak is gone from the iPhone's record, and there is no way they can tell if it was jailbroken. Please help, I can't sleep and am freaking out. Thanks a million.