T-Mobile is a multinational mobile phone operator. It is a subsidiary of Deutsche Telekom and belongs to the Freemove Alliance. T-Mobile operates GSM networks in Western Europe and the United States, and participates in network operations in Eastern Europe and Southeast Asia through financial means. With/kloc-0.09 million users, the company is one of the largest mobile phone companies in the world. The mobile phone you use is equivalent to China Mobile's custom machine, but it is bundled with some suppliers' software, and the quality is fine.