After its spin off from parent Western Wireless on May 3, 1999, VoiceStream Wireless was purchased by Deutsche Telekom AG in 2001 for $35 billion and renamed T-Mobile USA, Inc., in July 2002.

traces its roots to the 1994 establishment of VoiceStream Wireless PCS as a subsidiary of Western Wireless Corporation. As part of the merger, T-Mobile US acquired Assurance Wireless, the service subsidized by the Lifeline Assistance program of the federal Universal Service Fund. On April 1, 2020, T-Mobile and Sprint Corporation completed their merger, with T-Mobile now being the sole owner of Sprint, making Sprint an effective subsidiary of T-Mobile until the Sprint brand was officially erased on August 2, 2020.

In 2015, Consumer Reports named T-Mobile the number one American wireless carrier. The company has annual revenues of around $80 billion. T-Mobile US provides wireless voice and data services in the United States under the T-Mobile and Metro by T-Mobile brands (the latter was acquired via the purchase of MetroPCS in a reverse takeover in 2013, resulting in T-Mobile going public on the NASDAQ stock exchange), and also serves as the host network for many mobile virtual network operators. The company was founded in 1994 as VoiceStream Wireless before Deutsche Telekom purchased it in 2001 and renamed it after its T-Mobile brand. T-Mobile US is the second-largest wireless carrier in the United States, with more than 110 million subscribers as of the end of Q2 2022. Its largest shareholder is a multinational telecommunications company Deutsche Telekom AG, which as of August 2022, holds 48.4 percent of the common stock. is an American wireless network operator headquartered in Overland Park, Kansas and Bellevue, Washington, U.S.

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