What does telephone HD mean? How to cancel oppo?

If you are using an OPPO phone (ColorOS system), there is a high-definition sign on the status bar of the OPPO phone, indicating that the high-definition voice call is on.

1, OPPO models use the telecom card to turn on the VoLTE switch by default, and the mobile phone cannot turn off this switch;

2.OPPO 5G models use Unicom cards. If the 5G switch is turned on, the phone will turn on the VoLTE switch by default. If VoLTE needs to be turned off, the 5G switch must be turned off first.

3. VoLTE switch cannot be set during the call.

4. After 4.VoLTE is turned on and registered successfully, the word "HD" will be displayed in the notification bar of the mobile phone.

"settings > SIM card and traffic management >: select a SIM card > VoLTE HD call", just click close.

This answer applies to all OPPO models.