T-Mobile announced today that it was activating its 4G HSPA+ network in three major metropolitan areas with the goal of improving coverage and getting faster speeds for owners of unlocked iPhones. T-Mobile customers in Washington D.C. and surrounding areas, Baltimore, and Houston will now reportedly see a significant boost on T-Mobile's network. T-Mobile's internal testing reportedly showed a 70 percent download speed boost for the iPhone 4S on T-Mobile's network over AT&T's network.
