I've bought a used iPhone 5 to be going on with as my other phone keeps acting up. It came with iOS 6. I remember some time ago, probably back when i had an iPhone 3GS, i tried to update my then iPhone to an iOS version that wasn't the current version & it wouldn't let me - i had no choice but to either not update at all or update to the latest version at that time which i didn't want to do. I don't want iOS8. Is there any way at all i can update to a version of iOS 7? I forget which version of iOS 7 my iPhone 4S was running, but i wanted to update to iOs 7, not 8. Thanks.