T-Mobile is the name used by some mobile communications subsidiaries of Deutsche Telekom AG, including the Czech Republic, Poland, the United States, and the former Netherlands subsidiary. T-Mobile subsidiaries include T-Mobile Czech Republic, T-Mobile Polska T-Mobile US and T-Mobile Netherlands.

T-Mobile International AG was a holding company based in Bonn, Germany, with subsidiaries that operated GSM, UMTS and LTE-based cellular networks in Europe, the United States, Puerto Rico and the U.S. Virgin Islands.

T-Mobile International’s subsidiaries had a combined total of approximately 230 million subscribers worldwide, making it the thirteenth-largest mobile-phone service provider by subscribers. It was also the fourth-largest multinational after the UK’s