The Galaxy A51 5G runs the latest iteration of Samsung's OneUI over Android 10. It's got the June 1 security patch too, so it's about as up-to-date in terms of its software as possible.

Samsung has ended software updates for 2020's Galaxy A51, with no more security patches or Android versions coming.

The Samsung Galaxy A51 announced last December with Android 10-based One UI 2 is getting a new software update which brings in One UI 2.1.