I'm afraid that I'm going to have to argue that point.
Cingular (formerly AT&T and Cingular) has the largest network, and neither has been a population-centered or major highway-centered network in years.
Looking at their map, they've improved a lot since the last time I checked them out. But they're still digital-only, and I'm occasionally in places where only analog service is available. I've kind of gotten burned before on digital-only services...like the T-Mobile phone that worked great, as long as I never went inside a building. ;)
