T-Mobile announced today that it would be closing out 2012 by expanding its 4G coverage to 14 new metropolitan areas. The expansion is part of an ongoing $4 billion plan to advance T-Mobile's high speed network, which now offers enhanced coverage for more than 100 million people across the United States. T-Mobile's network is compatible with unlocked AT&T devices, and the company is actively encouraging AT&T customers to make the switch, advertising savings of up to $50 a month.
