After updating, green line came on my Samsung 21 fe phone.. after using it for 1.4 years, the issue came, then how can I trust and buy Samsung phones...
I'm sorry about your white screen issue on the Galaxy S21 FE. It's a common hardware problem caused by overheating. I recommend going to a service center for screen replacement. If the warranty has expired, you'll need to pay for the replacement, which might be costly. Despite the higher cost, it's the only solution.
For more details, you can read my post explaining the issue, its causes, and the after-update line problem here:
