Microphone does not work without daily restart

Hi and welcome to the forum.

Try a few things

  • ensure you do not have an SD card installed as Internal
  • Disable the 'Digital Wellbeing app
  • Disable google access to the mic

See Call quality and noise cancellation (regular calls, handsfree, Signal voice messages/Microsoft Teams video calls) - #58 by Razem

and

See Android 10: Reboot restores audio recording capabilities - #6 by Antoine

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