Galaxy A51 is receiving the One UI 2.1 with April 2020 security patch
Samsung's One UI 2.1 update is now rolling out to the Galaxy A51 | Android Central
Samsung Galaxy A51 begins to receive One UI 2.1 with April patch
Samsung Galaxy A51 One UI 2.1 update rolling out with April Security patch
Galaxy A51 starts getting One UI 2.1 update with A... - Samsung Members
Samsung Galaxy A51 gets update to One UI 2.1 and newer security patch - GEARCOUPON
One UI 2.1 update for the Samsung Galaxy Note 10 and Galaxy S10 adds 120 HZ refresh rate and re-enables NavStar, but there's a catch - NotebookCheck.net News