T-Mobile (NYSE:TMUS) has undoubtedly made some disruptive moves in the past year. The first big move came when the company did away with contracts. But it's T-Mobile's most recent move that really highlights just how aggressively the company is trying to acquire new customers. The strategy is clearly working. In the company's fourth quarter T-Mobile added about 870,000 new net postpaid customers. But the big gain in customers came with a cost.

As T-Mobile aggressively pursues new customers, it is facing two major challenges: costs and demands for better service. In the following video, Fool contributor Daniel Sparks takes a closer look at these challenges.

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Daniel Sparks and The Motley Fool have no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.

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