T-Mobile International AG is a holding company for Deutsche Telekom AG’s various mobile communications subsidiaries outside Germany. Based in Bonn, Germany, its subsidiaries operate GSM, UMTS and LTE-based cellular networks in Europe, Canada, 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 11 European countries – Austria, Croatia, Czech Republic, Germany (as Telekom), Hungary, Republic of Macedonia, Montenegro, the Netherlands, Poland, 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 150 million subscribers, making T-Mobile International the world’s tenth-largest mobile-phone service provider by subscribers and the fourth-largest multinational after the UK’s Vodafone, India’s Airtel, and Spain’s Telefónica.
Germany’s initial 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 equally imaginative name D2.
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