I just finished a working vacation in North Carolina, and I was very surprised to find out that certain areas of the state have, for practical purposes, only one cellular provider.
I spent a lot of time in the area around Burnsville, looking for a home my wife and I can retire in, and although my Tracphone would work more-or-less "OK" inside the city limits, anytime I travelled more than a couple of miles outside them, I was out-of-service.
Everyone I talked to about it said the same thing: "Only Verizon works around here".
This raises several questions, first among them being "Where are the competitors"? The area is growing, and ISTM that there would be at least one alternative to such a sole-source situation.
Bill