Hi, I am going to be studying abroad in London for 5 months and I would like to get a UK phone number to use on my iphone 3G that I bought in the US. I have looked into it but keep getting confused with how to go about doing it. From my research I would have to go through the o2 service provider but can I get a plan that is only temporary? Basically, can this be done and if so how? Thanks!