I preordered the 6S through Apple and paid in full, let's assume this is unlocked (I know there's seems to be some debate on if it will be or not). I was looking on http://www.apple.com/iphone/LTE/ to see what carriers are supported in the UK for the AT&T device (Model A1633), since I will be over there for about 2 weeks at the end of October. The only country listed outside the US for that model seems to be Puerto Rico. It looks like the Sprint, T-Mobile, and Verizon models work in the UK, and a ton of other countries as well. Am I just reading this thing wrong? I've never had to worry about this kind of thing before.