So I'm getting the iPhone 6 on friday and I was wondering. Should I update my current iPhone 5 to iOS 8 before switching over to the 6? I know that the iPhone 6 will ship with iOS 8, so will it let me load my iCloud back up to it if my backup is iOS 7? Im worried it won't let me restore my iOS 7 back up to the new phone since it will be running iOS 8 