According to Sina Tech [Chinese], China Mobile has announced that it has surpassed 15 million iPhone users on its network, which also means the company has seen 5 million new iPhone activations, a 50 percent increase in devices, since just October.
Apple's focus on the smaller carriers comes from the fact that although China Mobile controls 70 percent of the overall Chinese mobile market, it owns a far smaller percentage of the country's 3G market, lagging the other carriers in moving to 3G, much less 4G.
All of these 15 million China Mobile iPhone users is operating ("putting up with") the device on China Mobile’s 2G network as Apple has not yet supported China Mobile’s 3G (TD-SCDMA) network with a compatible version of the iPhone.
That incompatibility, China Mobile says, will be remedied once the company completes 4G LTE testing in June. One can only imagine the a) land rush, b) scalping when the iPhone (5?) comes to China Mobile in LTE form, no less.