I've acquired a brand new 3GS 16gb (legitimately, won a raffle at work). there's nothing other than a shrink-wrapped box. Patience is not one of my strong-points and I am itching to get it all set up and ordered & received an O2 PAYG sim to do this, but at work we're finalising arrangements with O2 for the O2 Open package for employees - i.e. as a corporate O2 customer, employees of our company will be able to come to O2 network at a discount rate on tariffs. Spoke with the colleague and O2's business rep last week, and the indication is that this will be 4~6 weeks before it goes live, as some further points need sorting. My understanding is that to take advantage of the O2 Open deal, effectively you're joining a new contract/package - which I don't have a problem with as I'm out-of-contract anyway with my current provider. My question is, can i insert the current PAYG O2 sim, set the phone up through iTunes, and then repeat the same again in a month or so once we get the O2 Open deal running, or will I have problems trying to do that with what will then be an already set-up phone tagged to a different (albeit PAYG) sim? any help & advice would be welcome.