[princenna77]

Hi, tried to install arrow OS on my LeEco Le 2 x526, ran into some errors and then flashed stock 5.9 21s rom. After that microphone no longer worked in calls except on loudspeaker, I could still record as well. Flashed the Pixel Experience from but I'm still facing the same issue.

[maxpayne]

Hi, tried to install arrow OS on my LeEco Le 2 x526, ran into some errors and then flashed stock 5.9 21s rom. After that microphone no longer worked in calls except on loudspeaker, I could still record as well. Flashed the Pixel Experience from but I'm still facing the same issue.

That is a kernel problem.
Try flashing a different factory firmware for your model