T-Mobile US, Inc., together with its subsidiaries, provides mobile communications services in the United States, Puerto Rico, and the United States Virgin Islands. The company offers voice, messaging, and data services to 72.6 million customers in the postpaid, prepaid, and wholesale markets. It also provides wireless devices, including smartphones, tablets, and other mobile communication devices, as well as accessories that are manufactured by various suppliers. In addition, the company offers services, devices, and accessories under the T-Mobile and MetroPCS brands through its owned and operated retail stores, third party distributors, and its Websites. It also sells its devices to dealers and other third party distributors for resale through independent third-party retail outlets and various third-party Websites. As of December 31, 2017, T-Mobile US, Inc. operated approximately 2,200 T-Mobile and MetroPCS retail locations, including stores and kiosks. The company was founded in 1994 and is headquartered in Bellevue, Washington. T-Mobile US, Inc. is a subsidiary of Deutsche Telekom AG.