How to use Unicom HD to play volte

China Unicom can open 4G volte HD voice service,

1, the so-called VoLTE, is an IP data transmission technology based on China Unicom's advanced FDD-LTE 4G network and TD-LTE 4G network, which transforms voice and data into each other and sends and receives them in the form of data, so as to directly realize calls, videos and supplementary services under the 4G network and provide better user experiences such as high-definition voice and high-definition video. China Unicom's VoLTE business brand is "High Definition Voice".

2.VoLTE service is open to China Unicom mobile phone users with 4G network function by default.

3. By the end of August 20 16, only eight cities, namely Beijing, Tianjin, Zhengzhou, Shanghai, Guangzhou, Shenzhen, Wuhan and Changsha, can provide trial commercial services. In principle, China Unicom mobile users who have opened the 4G network function will automatically open the VoLTE service function. Users only need to change the VoLTE terminal to use the VoLTE service. After the first opening, users will inform the service opening and related charges through SMS.

4.VoLTE service requires terminals supporting VoLTE function, and some terminals do not support high-definition video service.