sorry if this question has been asked before... I recently downloaded ziphone and decided to unlock and jailbreak my phone. I am an ATT subscriber, so i had no real need to unlock it. My question is this: is there anyway to relock my phone--that is, change everything back to the way it was after i bought it? My iphone is currently version 1.1.4. If I kept it unlocked and downloaded the next upgrade, will my iphone brick? ANY help/advice would be greatly, greatly, greatly appreciated!