Which Cell Phone Carrier is best in specific locations?

You can't really tell from a map. We live just outside a city of 200,000 people with generally good cell signal. But for some reason the area at our house and a couple miles around, cell signal for both AT&T and Verizon is weak to the point that some times it is hard to make/receive calls. Go 2 miles in any direction and signal is strong.

We had AT&T for years. But due to a very poor customer relations experience with AT&T, we changed to Verizon. Overall in our travels Verizon has been best.