The systems as I understand it would allow recievers to use satellites where practicable, both technologically and economically, and transfer to terrestrial systems under contract agreement where satellites don't make sense. Looking over my post, I was still wrong about the geosynch. Kansas is not the right place for a geosynchronous orbit.
Truth is stranger than fiction.
But I did a bit of research. So the regulatory approval must already exist for direct downlink on a frequency used by cel phones, pages, mobile voice mail machines, etc.