New features in One UI 3.1 for A51 - Samsung Members
Samsung One UI 3.1 Update Brings Select Powerful Features From the Galaxy S21 to the Galaxy S20, Galaxy Note20 and Galaxy Z Series – Samsung Global Newsroom
Samsung Galaxy A51 and Galaxy A21s start receiving the One UI 3.1 update based on Android
Samsung One UI 3.1 (Android 11) update roll out tracker [Cont. updated]
Samsung Galaxy A51 5G users receiving One UI 3.1 update alongside April 2021 security patch - Sammy Fans
Galaxy A51 5G catches up with the 4G model and gets One UI 3.1 update - SamMobile