That's pointless without context. If you compare the things those people use Bluetooth for to the things people use Bluetooth for on all other phones, including some dumb phones, you will realize that, yes, Bluetooth on the iPhone is borderline useless as you can only use it for audio (and a keyboard on the iPad). File exchanging, Internet connectivity, SIM sharing, etc. are all unavailable features.
9/14/12 at 8:14am