You can theoretically run a very low bandwidth set of links over any radio technology, including HF which will give you that long range connectivity.
Problem is, people expect streaming video on their smartphones. You can't do that over low bandwidth over the horizon links.
Continent scale? Depends on the continent. No way to do that in the Americas, there's just too much open space. You could do it in many cities I do think.
Problem is, people expect streaming video on their smartphones. You can't do that over low bandwidth over the horizon links.
Continent scale? Depends on the continent. No way to do that in the Americas, there's just too much open space. You could do it in many cities I do think.