I telling bcoz I have seen many Note20U and S20 series phones with display issues. Once Der is a line in screen dan Even after software update it doesn't go. So only option left is screen replacement

If it is out of warranty dan no service center will do the screen replacement for free.

Samsung makes very bad quality of Amoled screens. It's a very old issue of screen burn in Samsung phones. Mostly happens after completion of warranty. My suggestion is to change the phone company so than Samsung will realize their mistakes.

Samsung service centers are a pain in **bleep**. Useless service is provided @ Samsung service centers.I would suggest you to change the phone company as Der is lot of competition in market.

I do agree on this and will have to do the same if Samsung discontinues Note Series