What happened to the HD next to the oppoReno4sE5G signal display?

1. The mobile phone should support "VoLTE HD calling" function.

2. China Telecom SIM card has opened VoLTE service.

3. The local China telecom operator VoLTE network coverage is normal.

On-off method of China Telecom SIM card "VoLTE HD call"

Version 1, ColorOS 12. 1 and above: you can set >: notification and status bar > status bar to turn on or off the display of "HD call" (that is, the "HD" sign).

2. The following version of ColorOS 12. 1: Refer to the following explanation.

(1) How to open "VoLTE HD Call".

A. The SIM card of China Telecom has been successfully opened and registered with the "VoLTE HD Call" function at its service operator.

B after the B.SIM card is inserted into the mobile phone, the mobile phone will turn on the "VoLTE switch" by default, and the "VoLTE switch" entrance will not be displayed; That is, the phone can't turn off the "VoLTE switch", and the status bar of the phone will display the "HD" sign.

(2) "VoLTE HD Call" closing method.

If you need to cancel the "VoLTE HD Call" function and the mobile phone status bar does not display the "HD" logo, please contact the customer service of China Telecom operator.

Tips:

①“VoLTE HD Call function belongs to the business scope of operators (China Mobile, China Unicom and China Telecom). Please contact the operator's customer service to enable and cancel this function.

② After the operator has enabled and registered the "VoLTE HD Call" function, the "VoLTE HD Call" function will be enabled on the mobile phone, and the word "HD" will be displayed in the status bar of the mobile phone.