Beijing will bring fast 4G Internet connections to all of its subways by the end of July.
Passengers will have access to 4G networks on the platforms, in the carriages, at the entrances and in the tunnels, Beijing MTR Corp said.
Some metro lines, such as Line 4 and Line 9, recently introduced the latest global mobile standard.
More than 7.93 million subway trips were made on Sunday, according to the Beijing MTR Corp and Beijing Subway.
4G reached China late in 2013, and many public places are not yet covered by the networks.