T-Mobile on top in yet another wireless network test

Two things are certain in the wireless industry: your bill will never be right the first time, and every carrier will claim it has the best service. Measuring cell coverage and speeds is a fiendishly tricky business: one set of results will claim that T-Mobile is the best, while another has it languishing in last place.
Thanks to the difficulty in testing and vastly different methodology used by different third-party test firms, there's no such thing as a definitive ranking of the big four netwo