Extreme Android User
Aug 17, 2010
Cotswolds, England
This latest update is the 9th for the Global, Exynos, S21 series and is currently being rolled out by Samsung.

This big 1.1GB update is for camera, general bugfixes and May security patch.

Initially, as always, this is rolling out to the non-carrier branded, stock Samsung CSC codes first.

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 G99*BXXU2AUC8 March build.

It is a FOTA, (Firmware Over The Air), update and you can check... Settings > Software update... to see if it is available for you.


    • Performance of camera has been improved
    • Enhanced QuickShare
    • The security of your device has been improved
    • After updating, you will not be able to downgrade to the old software because of updates to the security policy
The update = G99*BXXU3AUDA

Download = 1149.41 MB

Build date = 23 April 2021

Release date = 26 April 2021

Camera version =

One UI version = 3.1

Android Security patch = May 2021

This is the 9th stable update in 88 days. Average = 1 update every 10 days.

(N.B. This post will be updated as more information becomes available)
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Samsung S21 series, Exynos, update AUDA

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