Where is the volte setting for HD voice?

If you use a vivo phone, the current system turns on VoLTE HD calling function by default, and there is no setting option. Just contact the operator to open the VoLTE service and use it under the coverage of VoLTE network.

The telephone numbers of the four major domestic operators are: 10099 (China Radio and Television), 10086 (China Mobile),10 (China Unicom) and 1000 (China Telecom).

1.Funtouch OS 9 and above system models: Enter Settings-Mobile Network/Dual Card and Mobile Network-Mobile/Unicom/Telecom-VoLTE HD Voice Call.

Note: If this option is not available, it is turned on by default.

Second, how to turn on the following system models of Funtouch OS 9:

Path 1: Go to Settings-More Settings-About Mobile Phone Status-SIM Card, just open "VoLTE Call";

Path 2: Enter Settings-Telephone and turn on "VoLTE Call".

If there is no VoLTE switch in the settings or you have more questions, you can go to vivo official website-My-Online Customer Service-Sliding Bottom-Online Customer Service-and enter the manual customer service for consultation.