I have never had an experience where the phone does not deliver power -- is your phone capable of powering and connecting to USB devices, or might the USB port be only for charging the phone? Flea-Scope is a USB 1.1 device operating at 12 Mbit/sec (aka full speed). One guy could not get the phone to connect until he switched to a real data cable -- many cables nowadays are power-only. But as long as you get a cable rated for data (which has more wires, typically 4), it should work -- there is nothing special about the cable from elecrow (well, except I have tested with it :-).