T-Mobile USA / AT&T tie-up is coming to fruition, despite the fact that neither carrier will be merging into the other. We'd heard shortly after the breakup that both operators would be agreeing to a seven-year roaming deal, but hadn't noticed any specifics on it until now. According to T-Mob's parent company Deutsche Telekom, the two have come to terms on a UMTS roaming agreement for the US (read: no international deals here), which will "allow [T-Mobile] to improve its footprint significantly among the US population and offer its customers better broadband coverage for mobile communications services in the future."
The carrier's population coverage will increase from 230 million potential customers at present to 280 million. As a result of the deal with AT&T, coverage will be extended to many regions of America in which T-Mobile USA previously had neither its own high-speed mobile communications network nor the associated roaming agreements. As if that weren't enough, T-Mobile USA will also receive a large package of AWS mobile spectrum in 128 Cellular Market Areas (CMAs), including 12 of the top 20 markets (Los Angeles, Dallas, Houston, Atlanta, Washington, Boston, San Francisco, Phoenix, San Diego, Denver, Baltimore and Seattle). Oh, and Deutsche Telekom gets $3 billion in cash. #winning