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On the standby page, find [Settings] on the desktop and click to enter.
Click to enter [Dual Card and Mobile network].
Click the phone card to turn off the [VoLTE HD call] switch. I am very glad to answer this question for you. I hope my answer can help you. I hope we can work together to solve problems in the future and support each other when we have problems
1. First, we click on [Settings] on the desktop of the mobile phone.
2. Then we click on [Wireless and Network] under the Settings menu.
3. Then we click on [Mobile network].
4. Then on the mobile network page, click the switch of \"VoLTE call\" under card 1 or card 2 to turn off HD, turn on the switch to turn on HD.