The mobile phone carrier has one-upped the competition with street-level maps of its coverage.
It's not perfect, however. I zoomed in on my house, where the signal strength is allegedly "great" by T-Mobile's account. I can assure you -- and the company -- that this is not true. The phone works, but the signal is, at best, adequate.
Still, this Web service punches a hole in a stonewall the mobile carriers have insisted on erecting for years. They've said maps of coverage and signal strength are "trade secrets" -- a shabby way of treating customers and potential customers.
T-Mobile deserves some credit here.