My wife and I are moving to London this summer and will likely be there for the next four years, but it is also possible that we will only be there for one year. We both have had iPhones since 2007 and are heavily invested in IOS. I would like to know what my options are for carriers and costs in London. I also travel abroad a lot and need an unlocked phone. Will UK carriers unlock phones that are on contract. I am considering paying full price for two unlocked iPhones in the US and then using the cheapest option that gives us each at least one GB of data. In the long run is this a cheaper option than buying a phone in the UK on contract and paying for the required plan? We will not need a lot of calling minutes as we do not know many people in London. We will likely Skype or FaceTime to call the US. Also which carrier provides the most reliable/fastest data service in London? Finally, where can I get a micro sim card upon arrival? Thanks in advance for your responses.