Just a few mobile related links...

I used to have T-Mobile and they swore up and down I should have coverage at least within a mile of my parents house, as the map said good signal. "It must be your phone," the said, as they encouraged me to spend more money. They've released a street level coverage map. Lo and behold, a huge cloud around my parents' house is a black hole of no signal.

Sprint also has a tower map, though their service is fairly ubiquitous around here, save for spots in Monterey that I've noticed.