If you're experiencing poor call quality when using your soundcore Sport X20 earbuds, there are several tips and tricks you can use to enhance the call quality and improve your overall listening experience. In this article, we'll be sharing effective strategies for fixing low and unclear voices on calls when you use the soundcore Sport X20 earbuds. To fix this issue, please try the following steps:

1. If you are only using one earbud, ensure that the other earbud is in the charging case.

2. Replace the ear tips with ones that fit more snugly in your ears and ensure that you are wearing the earbuds in the correct position to create a tight seal. If the earbuds are not worn properly in your ears, you may not achieve the correct call performance.

3. Ensure that the audio output device selected is "soundcore Sport X20" on the connected device and turn up the volume on your device.

4. If you make a call through an app, try using your phone to make a call instead to see if the problem persists.

5. Try testing your earbuds with a different Bluetooth device in a different environment to see if there is any difference.