T-Mobile US Inc was formed in 1994 as VoiceStream Wireless PCS (VoiceStream), a subsidiary of Western Wireless Corporation (Western Wireless). The Company provides wireless communications services, including voice, messaging and data, to its customers in the postpaid, prepaid and wholesale markets as well as a wide selection of wireless devices and accessories. It provides wireless communication services to three primary categories of customers: branded postpaid, branded prepaid and wholesale. Branded postpaid customers generally include customers that are qualified to pay after using wireless communication services. Branded prepaid customers generally include customers who pay for wireless communication services in advance. Wholesale customers, which include Machine-to-Machine and Mobile Virtual Network Operators, operate on the Company network, but are managed by wholesale partners. The Company provides wireless communication services through a variety of service plan options. It also offers a wide selection of wireless devices, including smartphones, tablets and other mobile communication devices, which are manufactured by various suppliers. The Company provides mobile communication services utilizing mid-band spectrum licenses, such as Advanced Wireless Services (AWS) and Personal Communications Service (PCS), and low-band spectrum licenses utilizing its 700 MHz A-Block spectrum. The Company's competitors include other national carriers, such as AT&T Inc. (AT&T), Verizon Communications, Inc. (Verizon) and Sprint Corporation (Sprint). Its competitors include numerous smaller regional carriers and MVNOs, such as TracFone Wireless, Inc., many of which offer no-contract, prepaid service plans. Competitors also include providers who offer similar communication services, such as voice and messaging, using alternative technologies or services.