If it could be developed, a generator on your wrist would surely be better, like an automatic watch.

Right wrist, if you happen to be a German truck-driver.

But, rather than a crank-handle, surely a squeeeze trigger like on a bottle of Windolene spray would make more sense, with a headset, natch. Presumably, holding the phone with one hand while cranking/pumping with the same would make more sense. (Dunno what the person at the other end might suspect, but that's another story...)

Nokia did a solar-powered phone 10 years ago*, which this has as backup also. Nokia sold bugger-all, IIRC.

One FAIL - as you're cranking, power is lost in the green LED's around the handle. Oh, fuc*king well thought out. NOT.

(OH, @TeeCee. In the target areas the company is thinking about, a lot of basestations and backhaul are solar/wind powered, giving decent power to the batteries. Nokia and others are actively pursuing this. Wind power would work nicely in Finland, too, as I just had my umbrella inverted by a stiff breeze the minute I stepped outside, but...)

*http://www.nokia.com/press/press-releases/showpressrelease?newsid=775492