I have an iPhone 5 that I'm not using and I want to hand it off to a family member whose iPhone 4S just died (wifi quit working, need to reflow the chip). The iPhone 5 has been completely reset, by me (the original owner), with my iTunes password, etc. The iPhone 4S is on the last version of iOS 7, and the replacement 5 is on iOS 8. Is at simple as restoring the 5 from a backup of the 4S and activating through iTunes, or: Will I have to update the 4S to iOS 8 first and restore the replacement phone from a backup of that, or will the phone/iTunes manage that for me? and, Will the SIM card that's in the replacement 5 be activated on our AT&T account when I set it up with iTunes, since I can't move the sim from the 4S to the 5, as they're different sizes? In other words, I want to switch to a reset used phone, that's on a newer iOS and uses a different (size) SIM card, will it be as simple and magic as connecting the new phone to iTunes and restoring from a backup of the broken phone, or do I need to do more than that? Thanks!