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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...
Changelog
System information
The update = G99*BXXS3BULC
Download = 244.04MB
Build date = 21 December 2021
Release date = 24 December 2021
Camera version = 12.0.00.83 (no change)
One UI version = 4.0
Android Security patch = 01 December 2021
This is the 24th stable update for the Exynos model in 329 days. Average = 1 update every 14 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)
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
Changelog
- Device security improved
- Bugfixes
- After upgrading you will not be able to downgrade to the old software because of updates to the security policy.
System information

The update = G99*BXXS3BULC
Download = 244.04MB
Build date = 21 December 2021
Release date = 24 December 2021
Camera version = 12.0.00.83 (no change)
One UI version = 4.0
Android Security patch = 01 December 2021
This is the 24th stable update for the Exynos model in 329 days. Average = 1 update every 14 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)
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