My iphone 4 is running 4.2.1 jailbroken. The sleep button on top stopped working last week (it is actually stuck down & wont pop back up). I am planning on making an appointment at the apple store where I am sure they will give me a new phone (I am still under warranty). Question #1 I am planning on doing a restore and then update to 4.3.1 before I bring it into the store. Will they know that it has been jailbroken? Will they give me a hard time or just swap it out? Question #2 If they give me a new phone running 4.3.1 will I be able to restore my iTunes backup from my previous broken phone? I recently purchased Pkgbackup and backed up my Cydia apps. Will I be able to restore the PkgBackup on the new iPhone? Can I take that backup created on PkgBackup and run it on a completely different iPhone?