China Mobile is the largest cellular operator in the world, with 644 million subscribers and two-thirds of the Chinese mobile market. But in the fastest-growing part of China's cellular industry, China Mobile is much less of a force. Competitors China Unicom and China Telecom each control about 30% of the market for fast 3G connections, which has more than doubled in size since the end of 2010, to about 118 million subscribers at the end of November. China Mobile has 40% of the market, but many of its 3G customers use fixed-line handsets instead of mobile phones to access the network, making them less valuable because they don't use data. China Mobile's slide is in part the government's doing. When Beijing issued 3G licenses in 2009, it forced the national champion to use a locally developed technology called TD-SCDMA.