Why is there background noise when the POCO C85 enables hands-free?

When using the POCO C85 on a hands-free call or playing music at a low volume, there is noticeable background noise, but it is barely audible at higher volumes. This is a product design issue and will not affect your experience.
If there is noticeable background noise when using the POCO C85 on a hands-free call or playing music at a low volume, please refer to the following details:
  1. When using the hands-free call or playing music, try to increase the volume to avoid noticeable background noise.
  2. Clean the speaker and microphone. Dust and other foreign matter accumulated in the speaker or microphone holes can cause noise.
  3. Disable or adjust sound effects that affect sound quality, such as the equalizer and surround sound settings.
  4. Check and install the latest versions of the system and applications to optimize audio processing.
  5. Restarting the device can resolve audio issues caused by prolonged use and restore normal audio functionality.