Mi10T Lite Microphone not working

[Yasje]

Hi all,

I just bought the mi10 Lite only the microhpone doesn't work with calling. Whatsapp calling or recording or whatever I use it works perfect. Only with normal calling microphone doesn't work. I use stable miui 12.0.1.0. Anyone knows how to fix this problem?

Thank you in advance.

 

[Yasje]

UPDATE
got it fixed. installed the weekly rom and after that I changed the Mobile network to 4G instead of 5G.