AUIE Global, Exynos OCTOBER Android Security update


Extreme Android User
Aug 17, 2010
Cotswolds, England
This latest release is the 18th for the Global, Exynos, S21 series and is currently being rolled out by Samsung only 23 days after the September update, AUHD.

This update is for device security.

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

This looks to be a fast roll-out with over 20 countries already released.

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*BXXU3AUHD 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. Alternatively, you can connect to the Samsung PC suite, Smart Switch and check via that.

  • Overall stability of functions improved
The update = G99*BXXU3AUIE

Download = 284.14MB

Build date = 13 September 2021

Release date = 28 September 2021

Camera version = (No change)

One UI version = 3.1

Android Security patch = 01 October 2021

This is the 18th stable update in 246 days. Average = 1 update every 14 days.

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

AUIE System information

Last edited:
The AUIE October Android Security update is now available for stock, (Non carrier branded), Samsung S21 devices in the U.K. with CSC code BTU.

No news, so far, on the following U.K. carrier branded devices and CSC codes...
  • EE (EVR)
  • Vodafone (VOD)
  • O2 (O2U)
  • Three (H3G)
The AUIE update is now being rolled out to U.K. users on the carrier branded phones for Vodafone with CSC code VOD.

No news, so far, on the following U.K. carrier branded devices and CSC codes...


O2 (O2U)

Three (H3G)