@Fr10
Hi,
You can check if the following suggestion will be helpful.
1. Make sure that there are no obstructions covering the microphone and speaker openings on the camera.
2. Confirm the microphone and speaker volume of the camera are set at a high level on our app.
3. Ensure the camera is positioned to allow clear and unobstructed sound reception. Avoid placing it in enclosed spaces or near surfaces that may reflect sound.
4. Test the audio with your mobile device positioned away from the camera, preferably in a different room. The proximity between the phone and camera during a voice call can cause audio feedback.
If the problem remains, could you please send us a video showing the reported issue? You can record the video on the camera's Live View page and send it to us(For example, upload the video to your cloud server, such as Google Drive, generate a link to download it, and send me the link via a private message.).
Best Regards