I have an Umidigi A5_PRO.
Ever since I’ve owned it, I cannot turn wi-fi calling on or off. When I select wi-fi calling, I get "com.android.phone has stopped" and cannot access the slider. This will happen even in SAFE MODE. No issue with any other items in the Settings app.
It was not a problem until now. Wi-fi calling has somehow turned on, and I cannot turn it off. I rely on call forwarding to use YouMail for my VM, so it is blocking my VM’s.
Things I’ve tried:
Clearing Data and Cache of the Phone app and Sim Toolkit.
Turning off Auto-updates in the Play Store
As I mentioned, problem happens even in safe mode.