Android 12 stock official update is rolling out, BUK8

Samsung have begun rolling out the first official stock update of Android 12, One UI 4, for the S21 series of devices…

The Galaxy S21 Global, Exynos, devices that will receive this update are…

  • S21 5G model SM-G991B
  • S21+ 5G model SM-G996B
  • S21 Ultra 5G model SM-G998B

This latest release replaces the previous G99*BXXU3ZUK1 / G99*BXXS3AUJ7 builds.

It is a FOTA, (Firmware Over The Air), update and you can check… Settings > Software update… to see if it is available for you. Alternatively, you can connect to the Samsung PC suite, Smart Switch and check via that.


The update = G99*BXXU3BUK8

Download = 290.45MB (for Beta testers)

Build date = 05 November 2021

Release date = 15 November 2021

Camera version =

One UI version = 4.0

Android Security patch = 01 November 2021

(N.B. This post will be updated as more information becomes available)

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