Wifi mac address lost and phone hangs during a call


Aug 24, 2015
Hi guys, during apps updates on my mom's Redmi 8, the wifi connection gone down.
When I press wifi icon, the wifi go ON for a while and goes immediately OFF.
I've discover that wifi mac address is not valid/undefined: I've try to reset dalvik/cache via twrp, reinstall stable rom 12.0.1 and upgrade to 12.0.2 but I've always same issue.

Together with same issue, during a call the phone hangs and calls are not possible. I need to reset phone by long press power button.

Do you have any suggestions?