Dominik, you are my savior!
I was very anxious about that.
It remains the mystery of the microphone not recording anything …
I tried both the recording app and a decibel assessment app: both the apps record from the top microphone, the right microphone, but not from the left one…
Is there anybody that can try the same, just to know if every Mate 20 pro has a not-recording-microphone on its bottom left angle? I supposed that microphone may be used for other purposes (noise reduction?) or may activate itself in some circumstances (e.g. very noisy environments?)