Hi all, I'm planning to visit NYC at the end of October (I live in the UK) and I wanted to buy an unlocked phone that I could happily use back home, and with a local SIM when I'm travelling for work. Will I be able to purchase one from Apple, or any other retailer? How has it worked in the past? Will this be possible? I might be able to buy an unlocked iPhone 5 back home but, us usual, I expect it to be a bit cheaper in the US Thanks.