My theory (which I developed too late in the game and which I would not have had any one to communicate it to) is that States should have built the tower infrastructure back when cell phones were first coming along. They could then lease space on these towers to the cell providers. It seems like you could even lease space to multiple carriers on one tower - but then I really don't know enough about cell towers to know if this is true. If so, it could have been a source of income for the states, and made it easier for cell companies to expand and compete in more areas.
Do you know where children get all of their energy? - They suck it right out of their parents!