T-Mobile CEO John Legere enjoys making waves — or perhaps he feels as if there's no choice, because he helms the smallest of the four major telecom companies. Legere is engaged in a feisty battle for market share. In Las Vegas recently, he crashed AT&T's party at a trade show and was summarily kicked out, and T-Mobile is going hard after its competitors in new commercials. But where this all ends is an open question. Many analysts believe T-Mobile will eventually be gobbled up in a merger.