What does telecom HD mean and how to turn it off?

HD means Volte HD voice call, and the display of HD on the mobile phone means Volte HD voice call is on. Taking Huawei's mobile phone as an example, the specific steps to turn off HD are as follows:

1. First find "Settings" on your mobile phone and click Open.

2. Open "Settings", find "Wireless and Network" and click "Enter".

3. After entering "Wireless and Network", click "Mobile Network" to enter.

4. Click "VoLTE HD Call" in "Mobile Network" to close.

5. Exit "Settings" and you can see that the HD sign above the phone has been turned off.