We are sorry to hear about your experience with the recent updates on your Samsung Galaxy Note 20 Ultra having issues with the vertical green line on the screen. I know the feeling of protecting your device from any external scratch or fall, and when it comes to this, it's like your world is falling apart.
Like what I have been recommending for similar issues, it's still best that our Samsung engineers and technicians can have a look and assess your device. So be sure to bring it immediately to the nearest Samsung authorized service center in your area.
