Earlier quoted context omitted.
They have developed on amateur frequencies since the FCC denied them an experimental license.
So, 5.8GHz or 2.4GHz or 900MHz, or what? Are the 40s (MHz) still available? I wonder how this beats the curvature of the earth, or is it being bounced of the ionosphere, or penetrating through the earth? It is either a lost work of Tesla or a bad version of this Douglas Rushkoff novel... http://www.amazon.com/gp/product/1887128905/ref=as_li_ss_tl?...
http://en.wikipedia.org/wiki/Amateur_radio_frequency_allocat...
While the 40M band beats the curvature of the earth quite reliably, I would expect that they are doing something in the UHF band if they plan on deploying this in licensed cell-phone frequencies.
Also the amateur band lets them transmit at much higher power than the ISM bands:
http://edocket.access.gpo.gov/cfr_2010/octqtr/47cfr15.245.ht...