Caller ID is not working (Xiaomi Note 4)
Please follow these steps if you are having difficulty enabling caller ID on your Note 4:
- Device settings > Apps > Eyecon > other permission > Appear Above Lock Screen
- Security -> Other Permissions -> Find Eyecon -> Display pop-up window
- Security -> Permissions -> Auto start -> Enable Eyecon
- Settings -> Battery & Performance -> Manage Apps -> Battery Usage -> Choose Apps -> Eyecon -> No Restrictions
See here for general Xiaomi solutions.