T-Mobile US is a publicly traded wireless telecommunications provider headquartered in Bellevue, Washington. Established in 1994 as VoiceStream Wireless, the company was later acquired by Deutsche Telekom and rebranded under the T-Mobile name. Its operations focus on nationwide mobile communication services, including wireless voice, data, and broadband offerings. The company has grown through major industry milestones, most notably its merger with Sprint in 2020, which expanded its spectrum assets and subscriber base. T-Mobile operates under a majority ownership by Deutsche Telekom and continues to develop its network capabilities, including sustained investment in 5G infrastructure across the United States.