In Apple Inc.'s latest effort to control its U.S. trademark for the term "App Store, " a law firm representing the company sent a cease-and-desist letter to wireless-application store operator GetJar.

最近，一家律师事务所代表苹果公司向无线应用商店运营商GetJar递交律师函，此举是苹果公司试图控制在美国控制“App Store”商标的最新措施之一。

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It also marks the first time a U.S. wireless operator is actively promoting a Voice Over Internet protocol (VoIP) application to its subscribers.

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Vodafone recently joined Verizon Communications as a major investor in Iusacell, Mexico's number two wireless operator.

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The parent of America's fourth-largest wireless operator, T-Mobile USA, cited "the extremely competitive environment in Germany and the recent foreign exchange rates development" as reasons for altering its outlook.

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