Okay, so I just got my iPhone 4 on Sunday, and I also got a warrenty for it incase it breaks. If I jailbreak my iPhone 4, then the warrenty is no longer valid. Is there a way that I could un-jeailbreak my iPhone incase the screen breaks or something? I know you can't remove the app, but couldn't I like update my iPhone or restore it or something so then it gets rid of it?