Android 11 arrives for Galaxy A21s, A51 gets One UI 3.1 - PhoneArena
5G versions of Samsung Galaxy A51 and A71 get One UI 3.0(Android 11) update - Gizmochina
Download Firmware for Samsung Galaxy A51 SM-A515U Android 11
Ranjit on X: "Samsung doing some good stuff :) Was updating my mother's Samsung A51 and it got the Android 11 update. Have to say Samsung is now taking Android updates seriously
Samsung A51 Hard Reset android 11 New Method - YouTube
Samsung Galaxy A51 receives Android 12 with One UI 4.1 - GSMArena.com news