One UI

Samsung May 2021 One UI 3.1 and Security Updates Tracker [May 04]

At the moment, Samsung rolling out the major Android 11-based One UI 3.0 and One UI 3.1 update to its eligible Galaxy phones and tablets. So far, the company upgraded countless Galaxy devices with this latest version while various are still waiting.

Aside from the major s/w updates the South Korean tech giant also rolls out new security patches to every smartphone monthly, quarterly, or biannually, as per their eligibility. Installation of newly arrived security patches is necessary for every smartphone owner as it improves system security.

Starting this year, Samsung announced its revised security update policy, which promises four years of regular updates for every Galaxy device launched since 2019. However, the company offering only two new security patches (a.k.a. “Biannually“) in the extended fourth year.

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Although several Galaxy smartphones and tablet owners are yet to receive the April 2021’s security patch Samsung already started releasing the May 2021 security patch to the latest Galaxy S21 series flagships from¬† April 26, 2021, a week ahead of May.

As always, Samsung will release countless s/w updates like Android 11, One UI 3.1, One UI 3.1, security patches, features, bug fixes, system improvements, and more to its innumerable Galaxy smartphones, tablets, smartwatches, and wireless earbuds.

In this dedicated “Samsung May 2021 One UI 3.1 and Security Updates Tracker”, you can find every single firmware update, which includes May 2021 security patch.

[List] Galaxy devices that have received May 2021 security patch: Sammy Fans

  • Galaxy S21
  • Galaxy S21+
  • Galaxy S21 Ultra
  • Galaxy Z Flip 5G
  • Galaxy S20
  • Galaxy S20+
  • Galaxy S20 Ultra
  • Galaxy Note 20
  • Galaxy Note 20 Ultra
  • Galaxy A51
  • Galaxy S9
  • Galaxy S9+

Samsung May 2021 One UI and Security Updates Tracker

Latest News: May 03, 2021

  • Galaxy S9 – May 04

Samsung Galaxy S9 series started receiving the May 2021 security update in the US. You can identify this release via PDA version numbers: G960U1UES9FUD1 and G965U1UES9FUD1 for the Galaxy S9 and Galaxy S9+ respectively.

  • Galaxy Z Fold 2 – May 04

The Galaxy Z Fold 2 phones getting the May 2021 security update. You can check the full details and changelog here. Source

  • Galaxy A51 – April 30

After a handful of premium Galaxy devices, the last year’s Galaxy A51 models have started receiving the May 2021 security update on the last day of April. This update carries release number: A515FXXU4EUD7. Source

  • Galaxy Note 20 – April 28

Just after the Galaxy S20 series, the May 2021 security update reached the Galaxy Note 20 and Note 20 Ultra smartphones. This release has the same changelog as the Galaxy S20 lineup. Meanwhile, users can identify this update through release numbers: N98xBXXU2DUDA. Source

  • Galaxy S20 – April 28

Following the Galaxy S21 series, the Galaxy S20 lineup begun receiving a new firmware update in Germany, which brings the May 2021 security patch. This release carries build versions: G98xxXXU7DUDB. Source

  • Galaxy Z Flip 5G – April 27

After the Galaxy S21 series, Samsung Galaxy Z Flip started getting the May 2021 security update. You can identify this update via the release number F707BXXU3DUD7. Source

  • Galaxy S21 – April 26

On April 26, 2021, Samsung started sending the May 2021 security patch with a new firmware update. This update also brings major Camera and Quick Share improvements. This release can be identified via the PDA firmware version: G99xBXXU3AUDA. Source


  • We will update this article just after another new Galaxy device gets the May 2021 security patch.

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