Stop Creating Corporate Goliaths

For years, T-Mobile’s chief executive, John Legere, has gleefully bad-mouthed his much larger mobile phone competitors, Verizon Wireless and AT&T, for their high prices and profit margins, and their low-quality service. Decked out in magenta sneakers and T-shirts, sporting long hair like an aging rocker, Mr. Legere promoted T-Mobile and himself to his 6.2 million Twitter followers as renegades — telephonic cool kids.

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