The company has never had more shops than a single wireless network provider that I have seen. The client specializes in no credit check/no contract monthly service. Their service area is slowly expanding with a fair portion of FL covered and parts of TX, CA and MI. I'm not sure where else they may have expanded to by now but it is largely a very blue collar operation with phones sold out of gas stations, flea markets and the like with some stand alone stores that receive payments while also selling Mexican lottery tickets, bus tickets to Mexico etc. They do have a company store in town for setting up service, making payments and repairing phones. So in answer to your question, yes they are a pretty localized phone service both in area and clientele.
But of course these are not what the OP was asking about as these are wireless phone shops, not telephone shops of businesses.