T-Mobile is a multinational mobile phone operator located in Bonn, Germany. It is a subsidiary of Deutsche Telekom and belongs to the FreeMove alliance.T-Mobile is a group of mobile phone corporate subsidiaries (all under the ownership of Deutsche Telekom) that operate GSM networks in Europe and the United States. The “T” stands for “Telekom.” Most subsidiaries of Deutsche Telekom have names beginning with “T-“. T-Mobile also has financial stakes in mobile operators in Eastern Europe. Globally, T-Mobile has 99 million subscribers, making it the world’s sixth largest mobile phone service provider and the third largest multinational after the United Kingdom’s Vodafone and Spain’s Telefonica.