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What does HD voice call mean?
HD voice calls rely on mobile phones to rely on 4G networks and use VoLTE technology to achieve clearer, delay-free calls.
The specific setting process for high-definition voice calls on the mobile phone is as follows:
1. Take the OPPO mobile phone X9 as an example. Unlock the phone screen, find the "Settings" selected in the red box, and click to enter. step.
2. Find "Wireless and Networks" selected in the red box and click to proceed to the next step.
3. Find "Mobile Network" selected in the red box and click to enter.
4. The font size of "HD Voice Call" selected in the red box is turned off, and there is no "HD" mark in the notification bar above.
5. Click to turn on "HD Voice Call", the "HD" logo will be displayed on the notification bar above, and the HD Voice Call function will be turned on.
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