Samsung Galaxy S21 series devices get December 2021 security patch update

The Samsung Galaxy S21 series devices have started receiving a new software update for users in Finland. The new Android 12-based software update will bring in the December 2021 Security Patch. Last month, Samsung started to roll out the One UI 4.0 for its Galaxy S21 models, and this third post-Android 12 OTA update featured the most up-to-date security patches.

Galaxy S21 new update brings in security improvements and bug fixes

Samsung’s December 2021 Security Patch will bring in fixes for five critical, 22 high, and 3 moderate CVEs from Google. Among Google’s new CVEs fixes, Samsung has managed to patch up an issue with the previous security release while three of them aren’t applicable to Galaxy devices. Apart from the CVE fixes from Google, Samsung has also brought in 18 SVE items for improving customers’ confidence in the security of Samsung Mobile devices.

Galaxy S21 users can identify the December 2021 security patch update through PDA version numbers – G998BXXS3BUL1, G996BXXS3BUL1, and G991BXXS3BUL1 for the Samsung Galaxy S21 Ultra, Samsung Galaxy S21 Plus, and Samsung Galaxy S21 respectively.

The new update will come with –

  • Improvements in the system security
  • Device stability improvements
  • Multiple bug fixes
  • New and enhanced features
  • Further performance improvements

Samsung Galaxy S21 series devices get December 2021 security patch update

Download and install the new software update for Galaxy S21 series

The new firmware update is being rolled out to the Samsung Galaxy S21 series users in Finland, however, a much broader rollout will likely happen in the coming days and weeks. If you want to check for the update manually –

  • Head over to the device’s Settings
  • Check for Software Updates
  • If an update is available for your device, download and install it

One UI 4.0 is the latest mobile software for Samsung devices based on Android 12 and it offers many simple and seamless features including customization in the user interface. The new user interface will enable you to come up with a customized mobile experience to meet your unique needs.


Aviral Sharma
Aviral Sharma
Android Expert
Aviral Sharma is a talented and passionate writer who has been using words to express his thoughts ever since he learned how to hold a pen. He is passionate about outer space, history, sports, and most importantly, technology. Aviral has been a regular writer for rootmygalaxy for over 6 years and has been covering games and Android guides. He currently owns a Samsung Galaxy S24 Ultra, an iPhone 13, and a HP Pavilion laptop.

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