I need some clarification on the iPhone : - If I buy one off ebay (from USA), I can unlock and insert my o2 SIM into it - correct? Will the phone then work properly (or will some items not work)? Even if everything works, I am struggling to see why i would buy now rather than wait till launch and get on o2? The cost of the phone is the same pretty much (USA ebay price compared to o2 launch), the only saving I would make is in the £20 per month difference between my tariff and the new one (although I would have to pay for downloading emails etc...). Am I missing something here?