Since yesterday, my fingerprint sensor started to become a bit
unresponsive, like it didn't work for a period of time and started
working again.But a few hours ago, it didn't want to work anymore, it's
like not detecting anything on the sensor. Tried...
Many people had the screen discolouration app on Note 9 after March
Security Patch update, I see people suggesting using the app "Oled Saver
App" to solve this problem temporarily, maybe can try out, or you can
try turning on AOD and see if it works....