New reports are surfacing that 35% more iPhones have been sold than have been registered with AT&T or the specially selected European carriers.

John Oates on theregister.co.uk reports, "Apple says it has sold 3.7m iPhones in total. AT&T says it has sold 2m iPhones, and European operators are believed to have sold between 300,000 and 400,000 handsets.

Which means there are either 1.3m iPhones being used as bookends, or an awful lot of people have gone to the trouble of unlocking the devices to run them on different networks."

Who's doing that?

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