What does it mean to display HD on the mobile phone?

If the status bar of vivo mobile phone displays HD logo, it means that the mobile phone card has been successfully registered to HD voice call, HD 1 means that the card 1 is in the network, HD2 means that the card 2 is in the network, and HD 12 means that both mobile phone cards have been registered to HD voice call.

Graphical links: Web links

Introduction of VoLTE: VoLTE is based on 4G network, and through IP transmission technology, operators can realize the unified bearing of data services, voice calls, video calls and short/multimedia messages services. Under the VoLTE network, the voice call quality is better and clearer, the call waiting time is shorter (the connection time is as short as 3 seconds), and you can surf the Internet while talking, and the data network will not be disconnected. The daily use of VoLTE function will make the communication experience better.

How to turn on VoLTE:

At present, the system turns on the VoLTE HD calling function by default, and there is no setting option. Just contact the operator to start the VoLTE service and use it within the coverage of the VoLTE network.

The contact numbers of the four major domestic operators are: 10099 (China Radio and Television), 10086 (China Mobile),10 (China Unicom) and 10000 (China Telecom), which can be dialed in time.

Funtouch OS 9 and above, enter Settings-Mobile Network/Dual Card and Mobile Network-Mobile/Unicom/Telecom-VoLTE HD Voice Call. If this option is not available, it will be turned on by default.

Funtouch OS 9 adopts the following system startup methods:

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 you have more questions, you can go to official website /vivo Mall APP-My-Online Customer Service or vivo official website Web Edition-Slide to the bottom-Online Customer Service-and enter the manual customer service for consultation and understanding.