120hz setting lowest brightness. See the phone in complete darkness. Watch grey colour screen video on YouTube. I'm seeing black line vertically. Already replaced one phone.
Display of Note 20U is not as gud as compared with earlier note series...I have never used 120hrz due to low screen resolution and yellowish colors...I am using vivid color with full blue settings and WQHD+ and high performance mode...Try changing the display settings of urs and see if any positive results...
Please perform the below mentioned steps to resolve the issue:
* Check device in safe mode: Press and hold the Power key, when Power off icon appears > Press and hold the power off icon. To exit safe mode: Restart your device.
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).
