My A21 still hasn't received Android 11 and I contacted customer support who directed me to download and try via the PC version of Smart Switch. I did that and even that said my phone is "Up To Date" showing Android 10?
I've contacted my carrier who said to contact Samsung who said my carrier releases the updated version or try the Smart Switch and so I'm basically getting nowhere here?
I've seen several posts where people said they have A21's and have received the update! My sons cheap A10 has Android 11 already so I'm a little lost. I would love to get an actual answer and help from someone with Samsung.