T-Mobile may be #4 in the cellular game, but they walked away a big winner in the recent FCC Spectrum 600MHz auction, paying nearly 8 billion dollars for the nationwide rights to that band. Although phones don't operate in the spectrum yet, they will be rolled out by year's end. Then T-Mobile will offer 4G LTE services in that market. Comcast also bought some, signaling they are planning to get into the mobile business. The rest were split between AT&T and US Cellular.