China's top three major telecom operators will launch rollover data services on Thursday, meaning unused data at the end of the month will no longer just disappear.

The operators will launch the service to all subscribers automatically.

Since May of this year, the three major operators have tested this kind of service within certain businesses and through a traffic data donation service.

In July, China's Department of Telecommunication Development urged telecom operators to launch data rollover plans to all the subscribers.

The authority also urged telecom companies to lower Internet prices and elevate connection speeds.