BEIJING - China Mobile, China's largest wireless service provider, said on Sunday that its 4G clients have topped 100 million by the end of January thanks to its expanded service coverage.

The company said it has established more than 700,000 4G base stations so far, covering over one billion people.

They forecast 4G users will top 250 million in 2015 and the company will set up one million 4G base stations by the end of the year.

Meanwhile, the company said it has expanded its 4G roaming service to more than 71 countries and regions, forming the biggest 4G network worldwide.

In December 2013, the Ministry of Industry and Information Technology licensed China Mobile, China Telecom and China Unicom to operate the home-grown TD-LTE standard, or Time Division - Long Term Evolution, a major variant of the 4G standards with the other being LTE FDD.