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.
call or chat samsung support
bring your device nearest samsung service center.
Note also, those "Experience Store" and "Customer Service" shops are operated by 3rd party businessmen, who want to EARN MONEY than representing SAMSUNG well. They are operating for Samsung around the country.
We are sorry to hear about your experience with the updates on your beloved Samsung Galaxy Note 20 Ultra having issues with the vertical green line on screen. Similar to our dear Samsung members' replies, I highly suggest bringing it to the nearest Samsung authorized service center in your area. Rest assured that your device will undergo an assessment to pinpoint the root cause of the issue. They may guide you and offer solutions to restore it.
or book an appointment with the Samsung Members app as follows:
Support > Book an appointment to set one.
Should you need further assistance and guidance, you may contact us via our online Samsung Customer Care support channels below.