Rang Orange (UK) up today to get my PAC code and the girl asked why I was wanting to move. I explained it was to get the new iPhone as my current iPhone which has my Orange sim card in it is costing me a fortune due to Orange's extortionate data charges. I made the point that O2 would be offering me unlimited data. To which she replied, 'as of yesterday, Orange are now offering the same.' Turns out in response to O2 subbing the iPhone, because they are at risk of losing a lot of customers (they are well aware there are loads of unlocked iPhones on their network,) they have brought in unlimited data to compete. So if anyone is on Orange - give them a call!