Hey, my wife is moving over to AT&T from Verizon and has a iPhone 5s on iOS 8.1.2. I backed that up on her PC, and I want to restore it on to an AT&T iPhone 5 with the latest iOS. She is temporarily going to use this phone until she buys the new one in a month or two. Any idea how to do this? iTunes isn't giving me an option to restore when I plug the AT&T phone in.