Samsung has been busy testing Android 11-based OneUI 3.0 beta on its flagship smartphones, but the Galaxy A31 and Galaxy M51 are also updating lower-layer smartphones with the latest upgrade, OneUI 2.5.
The One UI 2.5 update for the Galaxy A31 includes the firmware version A315NKSU1BTK2, but the firmware version for the Galaxy A51 is M515FXXU1BTK4. Both are based on Android 10 and come with the November 2020 Android security patch.
The new build eliminates some bugs, brings improvements to the camera and keyboard, and introduces Bitmoji support for Always-On Display.
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The Galaxy A31 One UI 2.5 update is currently seeded in South Korea, and the Galaxy M51 is seeded in Russia and Ukraine. If you haven’t received it yet, go to and check it manually. Configuration >> >> Software update Unit menu.