Does Xuzhou Unicom have HD voice?

VoLTE (Voice over LTE) is a voice service based on 4G network, also known as high-definition telephone service, including high-definition voice telephone and high-definition video telephone. You don't need to switch to the 2G/3G network mode when making a phone call. Under the 4G network, not only high-speed data services can be provided, but also high-quality audio and video calls can be provided.

Warm reminder:

1, 20 1 9 From April1,VoLTE business will be held in Beijing, Tianjin, Shanghai, Zhengzhou, Wuhan, Changsha, Guangzhou, Jinan, Hangzhou, Nanjing and Chongqing *** 1 1 city in June.

2.VoLTE service is suitable for post-paid and quasi-prepaid users of Unicom mobile phones.

3. Your mobile phone needs to support VoLTE function to use VoLTE HD phone service, and some mobile phones can support VoLTE function after upgrading.