Update WhatsApp to the latest version. If the issue persists, troubleshoot the issue based on the following scenarios.

1. If the network signal is poor or interference is strong, the call may be interrupted now and then, or noise may be audible. If possible, move to somewhere with good network signals and try again.
2. If the voice call volume is too low, you can turn up the media volume by going to Settings > Sound > Media, and try making voice calls again.
3. Use the recorder to play a recording. If it can be played normally, you can report the issue directly to the app developers by going to WhatsApp > > Settings > Help > Contact us. If there are noises when playing the recording, back up your data and take your device and proof of purchase to an authorized Huawei Customer Service Center for assistance.

1. If the network signal is weak or the network speed is low, the image may be blurry or may even freeze. In this case, switch to a stable network and try again.
2. Check the running requirements of WhatsApp for software and hardware. The call quality may be poor if your device does not meet the requirements. (For example, if the resolution of the mobile phone is too low, the app may be incompatible, or the image may become blurry or freeze.)
3. During a video call, maintain an appropriate distance from the front camera. The front camera supports a fixed focal length, so if you're too close to (< 30 cm) or too far away from (> 50 cm) the camera, the image definition will decrease.
4. If the light is insufficient, the image may be blurry. Try to make video calls in an environment with sufficient light, and keep your phone stable during the video call.
5. Check whether the video shot by the front camera is blurry.
   1. If the video image is blurry when you use the pre-installed Camera app, perform the following steps:
      1. Check whether the front camera lens is dirty.
      2. Check whether the camera lens area is blocked or covered by a protective film.
      3. Check whether the ambient light is sufficient.
      4. 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.
   2. If the video image is normal when using the pre-installed Camera app, but the video call is blurry in WhatsApp, you can report the issue directly to the app developers by going to WhatsApp > > Settings > Help > Contact us.