CSL announced at Mobile World Congress on Monday that it has begun upgrading its LTE network to 300 Mbps LTE-Advanced

The Hong Kong telco currently operates a dual-band LTE network consisting of 20 MHz of 1800-MHz spectrum and 20 MHz of 2.6-GHz spectrum. In partnership with ZTE, CSL is now in the process of deploying carrier aggregation (CA) software to combine those two frequencies and deliver faster connection speeds.

"We are the only operator in Hong Kong with 20 MHz in two frequency bands," noted CSL's chief technology officer Christian Daigneault. "We believe this gives us a very strong differentiator."

As of last week, CSL is testing carrier aggregation on its live network using three outdoor cell sites and one indoor site. It is also collaborating with ZTE and Qualcomm on its first LTE-A device. Once the device is in place and the CA has been deployed, the 300 Mbps network will go into commercial service.

Daigneault said the first product will be a mobile WiFi hotspot. The plan is to begin selling it during the second half of this year.

"Smartphones will follow later in 2014," he said.

With the deployment of 300 Mbps LTE-A, "we are witnessing a very exciting moment for CSL," said Zhang Renjun, senior vice president of ZTE.

"With this development, CSL will continue to lead the mobile communication market in Hong Kong," he said.