Is it better to buy an iPhone on O2 or on Orange? In terms of pricing the iPhone 3GS costs more or less the same on both networks and recent concerns about data caps for the Orange iPhone have been dismissed. What might be different though is Orange’s 3G service. In a recent ad campaign Orange claims it has the ‘UK’s biggest 3G network’ and we know several iPhone owners in the capital who have complained about network issues. Could the Orange iPhone offer a better 3G experience? We travelled around London to find out.