China United Network Communications Co Ltd, known as China Unicom, said on Thursday that it would announce its official TD-LTE 4G services and packages in 25 major cities in China on March 18.

"The 4G service will be expanded to 56 cities by May 17 and reach 300 cities by year-end," said Lu Yimin, executive director and president.

Lu said that the company is actively building its TD-LTE network infrastructure nationwide. It's also conducting a large-scale test of FDD-LTD services on its current WCDMA technology.