T-Mobile US Inc

T-Mobile US, Inc. is an American wireless network provider headquartered in Bellevue, Washington. The majority shareholder and namesake of the company is the German telecommunications firm Deutsche Telekom. T-Mobile ranks as the second-largest wireless carrier in the United States, boasting 131 million subscribers as of March 31, 2025.

Founded in 1994 by John W. Stanton of the Western Wireless Corporation as VoiceStream Wireless, Deutsche Telekom acquired a plurality stake in 2001 and subsequently rebranded it to align with its global T-Mobile brand. As of April 2023, the German firm retains a 51.4% ownership in T-Mobile US.

The company operates primarily under two brands: T-Mobile and Metro by T-Mobile. In 2020, T-Mobile expanded its reach by acquiring Sprint, which enabled it to operate Assurance Wireless, a service subsidized by the federal Lifeline program. The company continued its growth trajectory in 2024 with the acquisitions of Mint Mobile and Ultra Mobile, both of which are low-cost mobile virtual network operators maintaining their distinct brands. As of 2025, T-Mobile plans to acquire the wireless operations of UScellular.