In a few weeks I will have saved up enough to buy a 6S, I can't wait. I've been using a 4 on iOS 6 for the last 3 years or so. The battery life is not as good no more, but it's served me well. Also it's so hard to find apps that work on iOS 6. I was wondering if anybody was on a 4 or older and decided to upgrade, what did you go for and how different was it?