T-Mobile US, Inc. is an American wireless network operator headquartered in Bellevue, Washington. Its largest shareholder is Deutsche Telekom, a German company that operates telecommunications networks in several other countries. T-Mobile is the third-largest wireless carrier in the United States, after Verizon and AT&T, with 31.43% of the market share as of June 13, 2024. The company was founded in 1994 by John W. Stanton of the Western Wireless Corporation as VoiceStream Wireless. Deutsche Telekom then gained plurality ownership in 2001 and renamed it after its global T-Mobile brand. As of April 2023, the European company holds a 51.4% stake in the company. T-Mobile US operates two main brands: T-Mobile and Metro by T-Mobile. In 2020, T-Mobile expanded through the acquisition of Sprint, which also made T-Mobile the operator of Assurance Wireless, a service subsidized by the federal Lifeline program. The company's growth continued in 2024 with the acquisitions of Mint Mobile and Ultra Mobile, which remain separate brands. Additionally, T-Mobile serves as the host network for various mobile virtual network operators. Wikipedia