What can I do if my phone screen is yellowing?
a. Check whether “Eye comfort mode” is active. Eye comfort mode will filter out blue light and adjust the colour temperature of your display to reduce eye strain.
Go to “Settings”->”Display”-> “Eye comfort mode”->touch the trigger to activate /deactivate it.
b. In reading mode, the screen will become monochromic to imitate physical books. Go to “Settings”->”Display”->”Reading mode”, touch the trigger to activate/deactivate it.