T-Mobile US, Inc. (T-Mobile) is a provider of mobile communications services. The Company provides wireless communications services, including voice, messaging and data to over 55 million customers in the postpaid, prepaid and wholesale markets. The Company offers its services under the brands, T-Mobile and MetroPCS, in the United States, Puerto Rico and the United States Virgin Islands. The Company provides mobile communications services using 4G Long-Term Evolution (LTE), Evolved High Speed Packet Access (HSPA+), Universal Mobile Telecommunications Systems (UMTS), General Packet Radio Service (GPRS), Enhanced Data rates for GSM Evolution (EDGE), Global System for Mobile Communications (GSM) and Code Division Multiple Access (CDMA) technologies. T-Mobile also offers a selection of wireless devices, including handsets, tablets, and other mobile communication devices and accessories.