The "VoLTE HD Call" function business belongs to the business scope of mobile phone SIM card operators (China Telecom, China Unicom and China Mobile). After the "VoLTE HD Call" function is activated and successfully registered by the operator, and the mobile phone When the "VoLTE switch" is turned on, the "HD" logo will be displayed in the status bar of the mobile phone.

How to turn off the "HD" logo in the mobile phone status bar:

ColorOS 11 and above: The mobile phone will turn on the "VoLTE switch" by default and the "VoLTE switch" entry will no longer be displayed. If the "HD" logo is not displayed in the status bar of the mobile phone, that is, the "VoLTE HD call" function is cancelled, please contact the operator's customer service for processing.

ColorOS 7.0-7.2 version: Enter the mobile phone "Settings> SIM card and traffic management> Select a SIM card> Turn off "VoLTE HD Call". This operation only turns off the "VoLTE switch" on the mobile phone. ”, the phone status bar will not display the “HD” logo.

ColorOS version 3.2-6.1: Enter the mobile phone "Settings> Dual SIM card and mobile network> Select a SIM card> Turn off "VoLTE call". This operation only turns off the "VoLTE switch" on the mobile phone. , the "HD" logo will not be displayed in the status bar of the phone.

Warm reminder:

① OPPO models use telecom cards to turn on the "VoLTE switch" by default, and this switch cannot be turned off on the mobile phone.

② If the OPPO 5G model uses a China Unicom card to turn on the "5G switch", the mobile phone will turn on the "VoLTE switch" by default. If you need to turn off the "VoLTE switch", first turn off the "5G switch", and then turn off the "VoLTE switch".

③ OPPO 5G models use mobile cards to turn on the "VoLTE switch" by default, and the mobile phone can turn this switch on/off by itself.

④ "VoLTE switch" cannot be set during a call.