Turn on your TV, and AT&T will tell you it's them. Use T-Mobile's beefed up 3G in Philadelphia and you'll be sure it's not. Is it time for AT&T to pass the champion's belt? Not yet, but maybe soon.
AT&T handily trumped all the other carriers in our last nationwide 3G speed test, surprising a lot of people, if not AT&T, who's been trumpeting the "nation's fastest 3G network" ad line for months now. Just last week, though, we ran our first tests on T-Mobile HPSA+ network, which T-Mobile is starting to roll out in lieu of 4G tech like WiMax and LTE. It's fast. Dead fast. 21Mbps theoretically fast. Streaming HD video fast. And again, it's 3G.