I live in the UK but I'm currently in the US on holiday. I have two iPhone 6S Plus 128GB in silver reserved for collection at an Apple Store and will pay for them in full. I plan to get AppleCare+ on them too. I have a couple of questions that I'd like some help with before I commit to the purchase. The reservation states that they are the iPhone 6S plus (GSM) and the T-Mobile network was selected. 1) what is model number of the 6S plus 128gb in the US that's available on T-Mobile? A1634 or A1687 2) what is the model number of the SIM-free 6S plus 128gb available in the UK? A1634 or A1687 3) is the AppleCare+ bought in the US able to be used / serviced / phone replaced in the UK? Many thanks for your help and replies.