To everyone thinking about updating their phone to android 11... don't. It claims to give you better performance and improve battery life. It doesn't. It slows your phone down and decreases your battery life by 20-30% I really hope that they fix this or at least make an option to go back to android 10.
My nan has a A42 5G phone and I didn't really notice any decrease in performance (which I shouldn't because they cost quite a bit of money) so I think it's for "older" models, Even know the A21s (my phone) came out in May 2020.
Heh, guess I must've missed that one, but either way I haven't had any performance degradation or battery drain issues on any of my android 11 Samsungs (Note 10+ 5G, S20 Ultra and S21 Ultra although that one's only had 11).
A51 5G user here and have had no problems at all so far (My phone has had Android 11 for nearly 1 month). For me basically everything has been improved and nothing has gotten worse. Thanks anyway 😊 Much appreciated 😊