I'd expect them to use at least some amount of exclusive spectrum for this service, or there would be issues in fringe areas in at least the uplink (the satelli

I'd expect them to use at least some amount of exclusive spectrum for this service, or there would be issues in fringe areas in at least the uplink (the satellite couldn't selectively tune out phones talking to terrestrial towers if they are using the same frequencies that phone-to-satellite comms are using).