1. Switch to another audio source to check whether the fault lies with the audio source.
2. Confirm that you are using a Huawei-compatible headset, as different headset sequences may cause compatibility issues. For example, you will not be able to use an Apple headset with a Huawei device.
3. Check that the headset is completely plugged in and that your phone's protective case is not preventing you from fully inserting the headset jack.

1. Switch to another audio source to check whether the fault lies with the audio source.
2. If the sound quality is causing you discomfort, lower the volume by 1 to 2 bars.
3. If you are in an area with a weak signal or strong interference, sound during calls may be intermittent. In this case, move to an area with a strong signal or less interference.
4. If you are using a non-Huawei headset, noise may be heard due to poor contact between your phone and the headset. In this case, use a standard Huawei headset instead.
5. If you are using a headset adapter, make sure it's compatible with your phone, as incompatibility may cause poor quality sounds. It is recommended that you use a standard Huawei headset instead.
6. Use a different headset and check whether the sound issue persists. If the issue stops occurring when you plug in another headset, it indicates that your headset is faulty. Use a different headset instead.
7. Noise may be heard if you rotate the headset jack during playback. Avoid rotating the headset jack in order to maintain a proper connection.

If the issue persists, back up your data and take your device and proof of purchase to an authorized Huawei Customer Service Center for assistance.