If you're experiencing issues with unclear or interrupted calls when using soundcore C40i, there are several steps you can take to troubleshoot and potentially resolve the problem. Here's a guide to help you improve your call experience:

1. Using the earbuds for gaming and calls at the same time can affect call quality. We recommend avoiding this scenario.

2. Some phones with high output power may experience voice distortion or excessive noise during calls if the earbuds' volume is set too high. Please lower the volume to an appropriate level.

3. Switch to a different network or environment to see if the situation improves as call quality can be affected by low network speeds or excessive environmental interference.

4. Outdated versions of your earbuds' firmware, call software, and device operating system can affect call quality. Please update them to the latest version.

If you encounter any other issues or your issue has not been resolved, please contact us for further assistance.