[24/DEC/21] BULC. 3rd DECEMBER update

Only 7 days after their second December update, BUL6, Samsung has begun rolling out their 5th Android 12 release for the S21 series of international devices.

Initially, as always, this is a staged rollout to the non-carrier branded, stock Samsung CSC codes first.

The Galaxy S21 international 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*BXXU3BUKG/BUL1/BUL6 builds on the international devices.


  • Device security improved
  • Bugfixes
  • After upgrading you will not be able to downgrade to the old software because of updates to the security policy.

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.

System information

The update = G99*BXXS3BULC

Download = 244.04MB

Build date = 20 December 2021

Release date = 24 December 2021

Camera version = (no change)

One UI version = 4.0

Android Security patch = 01 December 2021

This is the 24th stable update for the Exynos model in 323 days. Average = 1 update every 13 days.

TOP TIP: Wipe the phone’s cache partition and use the Galaxy App Booster after updating.

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

Sharing is caring!

Leave a Reply