Hi all, thx for the replies. My question was really oriented around whether a US-purchased iPhone will work in the UK. Would I have to sign-up to O2 or, if it's unlocked, then can I use any pay as you go tariff (I'm a bit naive about this)? What works out cheaper? I've seen unlocked (= "sim free"?) iPhones going for £600+ over here, they must be cheaper than c$900 in the US?