Ok so, as the title states, I have an iPhone 4 (on 3), I live in the UK, I'd like to continue using my iPhone 4 in the USA, my question is, given the difference in bands used in the USA, does this mean I'm stuck to AT&T and Verizon (with no 3G). Are there any local carriers in CA I could use or given my micro sim am I shunted to the big carriers? Here in the UK, we have 1 month rolling pay sim only monthly contracts, that you can cancel with a months notice, which would be ideal for me. Do any US carriers have that kind of plan? If so, do any offer micro sims Note: I will be jail breaking my iPhone, but I don't want to get into what jailbreak I should use etc etc. I know how to do all that, I just want advice on the best carrier to go with given my needs.