Hello guys, For the record, I lost a 64G iPad 4 before, which broke my heart. So I really want to take good care of my new iPad mini R. But to prepare for the worst case scenario, I'd like to know if iOS 7 is really immune from being reset, once I singed in with iCloud account. Which part is it going to be locked? I have a feeling that some hackers can always find a way to sneak in. But the question, has it been done? Thx.