Can I revert to Android 11 after I have updated to Android 12 on Samsung s20 fe? Will warranty be valid after downgrade?

[ea1975]

Can I revert to Android 11 after I have updated to Android 12 on Samsung s20 fe? Will warranty be valid after downgrade?  I bought my phone with android 11 and updated to android 12.  I didn't use any rom.

[shazcrystal34]

They are NHS a I d s so I've informed them and they are also chasing the company up