Back in January 2021, Samsung launched the Galaxy S21 flagship series, which introduces three variants including standard, Plus, and Ultra. Came pre-installed with Android 11-based One UI version 3.1, the Galaxy S21 lineup will get three major Android OS upgrades as well as four years of security patches.

Now, the South Korean tech giant has started releasing a new software update based on One UI to the Galaxy S21, Galaxy S21+ and Galaxy S21 Ultra devices. The recent release comes with improvements to system security as well as stability. Moreover, it also optimizes the stock applications for a better overall user experience.

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Samsung Galaxy S21 Series Update

If you want to check for the latest update manually, head to your device Settings tap on Software updates and finally hit the Download and install button.

November 26

November 24

November 23

November 15

November 02: One UI 4 Beta 4

Samsung started releasing the latest One UI 4 Beta update for Galaxy S21 series in South Korea and Germany. Check changelog below.

• Delete stretch effect when overscrolling
• Removed pop-up allowing notification when first running the app
• Stuttering when setting WQHD
• Frame drops when the alarm goes off
• WIFI, hotspot not turned on under certain circumstances
• Screen dims when unlocked
• Two Call Logs are created each time you send or receive a call.
• Fingerprint recognition does not work after intermittently rebooting
• Under certain circumstances, nearby WIFI APs cannot be searched
• Rebooted during voice calls
• Keypad closed
• ONEUI Home when exiting by closing all recent apps
• Rebooted after force shutdown
• Fixed other minor issues

November 02: November 2021 patch in the US and Singapore

Samsung is now expanding the November 2021 security patch to the Galaxy S21 series devices in the US (Unlocked on AT&T, Bluegrass Cellular, C-Spire, Comcast, Sprint, T-Mobile, and Verizon’s networks) and Singapore. [Source]

October 26: October 2021 patch at T-Mobile US

T-Mobile network carrier has begun sending a new firmware update for the Galaxy S21, Galaxy S21+ and Galaxy S21 Ultra devices in the US. The new One UI 3.1 based software update comes with October 2021 security patch for better device security. [Source]

• Galaxy S21 – G991USQS4AUIR
• Galaxy S21 Plus – G996USQS4AUIR
• Galaxy S21 Ultra – G998USQS4AUIR

October 25: November 2021 patch in Germany

Earlier, the Korean tech giant has started to release the One UI 4 Beta 3 update for the Galaxy S21 series devices in several regions. This release came with the latest November 2021 security patch for the Beta participants, however, the same patches releasing for the Galaxy S21 phones running Android 11 in Germany. [Source]

• Galaxy S21 – G991BXXS3AUJ7
• Galaxy S21 Plus – G996BXXS3AUJ7
• Galaxy S21 Ultra – G998BXXS3AUJ7

October 23: One UI 4 Beta 2 in India

Samsung is now releasing the 2nd One UI 4 Beta update for the Galaxy S21, Galaxy S21+ and Galaxy S21 Ultra in India. The update also brings November 2021 security patch. You can see the software versions of this update below.

• Galaxy S21 – G991BXXU3ZUJG
• Galaxy S21 Plus – G996BXXU3ZUJG
• Galaxy S21 Ultra – G998BXXU3ZUJG

October 21: One UI 4 Beta 3 in the US

Samsung is now expanding the third One UI 4 Beta update for the Galaxy S21 series smartphone users in the US. Just like the Korean variants, this release includes the final Android 12 version (AOSP) as well as improvements and optimizations for Color Themes. [Source]

October 20: One UI 4 Beta 3

Samsung just released the most-awaited One UI 4 Beta 3 for the Galaxy S21 series smartphone users in South Korea. After the initial rollout, the update will soon be expanded to more markets including the US, Germany, India, UK, and China. You can identify this release via the last four digits of the PDA release number – ZUJB. [Source]

Check the official One UI 4 Beta 3 changelog below.

• Fixed an issue where only some menus were partially untranslated right after the porta update
• Google AOSP reflected (Google final release was reflected)
• Overscroll effect changed from existing glow to stretch form (Android 12 changed)
• Voice command in the camera Misrecognition improvement
• Pet lighting effect applied
• Color theme function stabilization
• Keyboard shortcut issue fixed
• Calling/texting on other devices fixed
• Bixby not being called on the lock screen
• Fixed system UI forced shutdown
• Many others Apply improvements

October 16: October 2021 Security Patch [USA]

The Galaxy S21 series devices (Unlocked and carrier-branded) have started grabbing the October 2021 security patch through a new software update in the US. The latest update brings version numbers mentioned below:  [Source]

• Galaxy S21 Ultra – G998USQS4AUIN/G998U1UES4AUIN
• Galaxy S21 Plus – G996USQS4AUIN/G996U1UES4AUIN
• Galaxy S21 – G991USQS4AUIN/G991U1UES4AUIN

The Galaxy S21 is the first Samsung smartphone lineup that had upgraded to the stable Android 12-based One UI 4.0. Now, the company started releasing a new One UI 4.0-based firmware update to the Galaxy S21 series devices with regular improvements.

Identified via PDA firmware version ending BUKG, the latest Galaxy S21 update is making its way to the European market, starting with Germany. Unlike the recent release, this new OTA brings just improvements to the system functions for a better user experience.

Firmware versions

• Galaxy S20 – G991BXXU3BUKG
• Galaxy S21 Plus – G996BXXU3BUKG
• Galaxy S21 Ultra – G998BXXU3BUKG

To be mentioned, this new improvements update arrived ahead of December 2021 security update, therefore, it’s expected to fix some unknown errors and issues and further enhance the system functions. Following the initial rollout, the update will soon be expanded to more regions.

Recently, Verizon released a new One UI 4.0 update for the Galaxy S21 lineup in the US. The changelog mentions improvements to the system performance and enhancements to the device’s stability. Though, consumers claimed that it fixes the display refresh rate issue.

If you want to check for the latest update manually, head to your device Settings tap on Software updates and finally hit the Download and install button.

| Source |

From October 20, Samsung started sending its latest security update to the Galaxy devices. However, the Galaxy S21 series was the first to grab the November 2021 security patch in South Korea.

To be mentioned, Samsung’s every new security update comes with fixes for a lot of CVEs from Google and various SVEs for One UI software system, although, the patch details have yet to release.

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The Korean tech giant is rapidly expanding the reach of its November 2021 security patch to more and more Galaxy devices worldwide. Below, you can check all the Galaxy devices that have started getting the latest security patches.