Just wanted to say, despite the many posts to the contrary, that my iPhone 4S updated to IOS 8.3 and it runs great. All the features work, phone did not slow down, and I'm very happy with my old phone. I would love to upgrade to a 6, but just can't justify the expense, since I am now retired and not using the phone as much. Have a question though, my wife has a 4S, and it will not update to 8.3, stays stuck on 7.1.2. Any reason why this is happening? Thanks!