Look at you go, T-Mobile! T-Mo was one of the last off the bat with a 3G network — hell, their 3G network is just now really getting to a respectable size — but now they’re the first in the US to roll out a 21 Mbps HSPA+ (still considered 3G, though its 5-7x faster than what they’ve got now) test market. It’s only in Philadelphia for now, though more markets ought to light up early next year.

This is right around the same time we’d expect AT&T to be lighting up their HSPA+ test zones, if they hadn’t bailed on the upgrade in hopes of speeding up their move to 4G technology LTE.

[Via MobileBurn]