A Map Of Wireless Dead Zones In San Francisco: Every Single One Is AT&T

The San Francisco Business Times recently began a project to document wireless dead zones in the Bay Area. It's a good idea; they have a simple form any user can fill out to give the address of the dead zone, explain it a bit if they choose, and name their service provider. So far, they've accumulated quite a bit of data -- over 500 data points. The best part? As far as I can tell, every single one of the dead zones is on AT&T's network. To be clear, in their form, the Business Times allows you to choose AT&T, Sprint, T-Mobile, Verizon, and Other. But the only reports coming in are for AT&T. That's not to say there aren't dead zones for the other providers, but clearly, they aren't nearly as big of an issue as they are on AT&T, where the problem is widespread.