The company began in 2001 following the purchase of VoiceStream Wireless PCS by German telecommunications company Deutsche Telekom. Trading as T-Mobile USA, the company was the target of an AT&T takeover bid in 2011, but the deal fell through after rejection by U.S. regulators. In 2013, T-Mobile USA's merger with MetroPCS Communications led to the company's renaming as T-Mobile US, Inc. Currently (April 2019) a proposed merger of T-Mobile and Sprint is pending approval. Today the company provides wireless voice, messaging, and data services in the United States, Puerto Rico, and the U.S. Virgin Islands, under the T-Mobile, MetroPCS, and GoSmart Mobile brands.
T-Mobile currently has around 77.25 million subscribers, of which 42.5 million are postpaid customers. This places it ahead of Sprint, but still behind Verizon and AT&T. In 2018, the company had an average revenue per user (ARPU) of 441.69 U.S. dollars and a postpaid churn rate of 0.99 percent in the fourth quarter of 2018.