150,000 sounds really high. Pinetop AZ only has 4000 people total, and if the other towns were similar in size, every person in those towns would have to make 10 calls during the collected period. Does this include multiple database entries for individual calls or internet access?
You don't have to make a call to register with the tower. I would imagine that sitting directly between two towers would cause lots of renegotiations as one signal gets stronger or weaker.
