T-Mobile

T-Mobile International AG is a German holding company forDeutsche Telekom AG's various mobile communications subsidiaries outside Germany. Based in Bonn, Germany, its subsidiaries operatesGSM, UMTS and LTE-based cellular networks in Europe, the United States, Puerto Rico, and the U.S. Virgin Islands. The company has financial stakes in mobile operators in both Central and Eastern Europe.

The T-Mobile brand is present in 12 European countries – Austria,Croatia (as Hrvatski telekom), Czech Republic, Germany (asTelekom), Hungary, Republic of Macedonia, Montenegro, theNetherlands, Poland, Romania, Slovakia, and the United Kingdom, as well as the United States, Puerto Rico, and the U.S. Virgin Islands.

Globally, T-Mobile International subsidiaries have a combined total of approximately 230 million subscribers. T-Mobile International is the world's fifteenth-largest mobile-phone service provider by subscribers and the fourth-largest multinational after the UK's Vodafone, India'sAirtel, and Spain's Telefónica.

History
Germany's first mobile-communications services were radiotelephone systems that were owned and operated by the state postal monopoly, Deutsche Bundespost. It launched the analog first-generation C-Netz ("C Network", marketed as C-Tel), Germany's first true mobile phone network in 1985.

On July 1, 1989, West Germany reorganized Deutsche Bundespost and consolidated telecommunications into a new unit, Deutsche Bundespost Telekom. On July 1, 1992, it began to operate Germany's first GSM network, along with the C-Netz, as its DeTeMobil subsidiary. The GSM 900 MHz frequency band was referred to as the "D-Netz", and Telekom named its service D1; the private consortium awarded the second license (now Vodafone Germany) chose the name D2.

Deutsche Bundespost Telekom was renamed Deutsche Telekom in 1995, and began to be privatized in 1996. That same year, DT began to brand its subsidiaries with the T- prefix, renaming the DeTeMobil subsidiary T-Mobil.

In 2002, as DT consolidated its international operations, it anglicized the T-Mobil name to T-Mobile.

On April 1, 2010, the T-Home and T-Mobile German operations merged to form a new wholly owned DT subsidiary, Telekom Deutschland GmbH. The T-Mobile brand was discontinued in Germany and replaced with the Telekom brand. The T-Mobile brand is still used in markets outside Germany. Non-German mobile-network assets are organized into various country-specific subsidiaries under the T-Mobile International AG subsidiary of DT.

In 2010, T-Mobile UK became part of a joint venture with France Télécom's UK mobile-network provider, Orange (UK). Combined, the two companies make the UK's largest mobile-network operator, called EE. Despite the joint venture, the T-Mobile and Orange brands continue to co-exist in the UK market.

In July 2014, Telekom group had bought the Romanian companies Romtelecom and Cosmote, acquiring almost 40 percent of the country's shares. On July 30, 2015, T-Mobile posted its 2nd quarter earnings of $361 million, which surpassed estimates.