Members app as follows:
Step 1. Long press Samsung Members icon on Apps screen and tap Error reports.
Step 2. Tap OK on agreement popup to send system log data.
Step 3. Select Symptom category "Display".
Step 4. Describe the problem in details and SEND.
Technical explanation, SAMSUNG kept silent. FREE repair, actually amoled screen replacement is necessary, is under its warranty obligation, outside of it charging around 15k.
I traded-in my damaged Note20-U in last pre-order offer for another Samsung flagship phone for 16.2k. These phones are expensive, and the consumers gamble that they will serve well & long.
I suppose SAMSUNG cares for its brand-- but it's the consumers' choice and risk.
BTW, my wife's iPhone13 Pro-max got 'full white screen" one morning to start her day aghast, no chance to backup anything in the phone. It's less than 1 year old service, but good it happened while still under warranty. I learned this didn't happen only to her. Apple got defective model/s too.
Peace. Be well.
Expecting your device to perform better after an update, but your device end up having a white line on the screen instead, then I will get frustrated too. For that, we are sorry about your experience and we apologize for the inconvenience it caused you.
In addition to our dear Samsung members replies, I highly recommend bringing it immediately to the nearest Samsung Authorized Service Center in your area. Rest assured that our Samsung engineer and technicians are competent to assess your device with suggestions, and offer to provide prompt solutions to restore it up to optimum performance.
For more assistance and guidance, you may contact us via our online Samsung Customer Care support channels below.