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Samsung resumes updating its devices to Android 12

NextPit Samsung Galaxy Z Flip 3 side open
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After canceling the rollout of the operating system update for the latest flagship phones, Samsung managed to resume the update still in 2021. This week, Galaxy S21, Galaxy Z Flip 3, and Galaxy Z Fold 3 series models started receiving the Android 12-based One UI 4 update package.


TL;DR

  • After fixing incompatibility with Google Play system, Samsung resumes update to Android 12.
  • The new version of the Galaxy S21 series firmware isG99xBXXS3BULC (global market).
  • On the Galaxy Z Flip 3 and the Galaxy Z Fold 3 the new firmware becomes F711xxxS2BUL6 and F926xxxS1BUL6 respectively.
  • The Android security patch level of these builds is December 2021.

On December 22, Samsung suspended the One UI 4 update shipping for the flagships announced in 2021 because of an incompatibility with the new version of Google Play system. The problem was first verified in Korea, the company's headquarters, and caused the devices to become unusable.

According to the manufacturer itself, after working on a solution together with Google to resolve the bug, stable updates of One UI 4 were resumed worldwide. With this, the stable version of the Galaxy S21 series firmware becomes G99xBXXS3BULC (global market). As for the Galaxy Z Flip 3 and Galaxy Z Fold 3 models, they are F711xxxS2BUL6 and F926xxxS1BUL6 respectively. The Android security patch level of these builds is December 2021.

Samsung officially released One UI 4 based on Android 12 on November 15 and pushed it first to its flagship devices. The Galaxy S21 series models were the first to get it, which was soon followed by the Galaxy Z Flip and Z Fold families.

Finally, we hope Samsung ended the year by overcoming the problems with the OS update on its flagship smartphones. Besides Samsung, OnePlus went through the same headache with a buggy OxygenOS 12 update for the OnePlus 9 and OnePlus 9 Pro. And even Google didn't escape this time.

So, has your Galaxy phone received the Android 12 update yet? Was there any kind of bug in the update package of your device? Please share your experience with our community in the comments below.

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Camila Rinaldi

Camila Rinaldi
Domain Head

I have 15 years of experience reviewing smartphones and wearables, blending tech know-how with a real love for innovation. I've led popular tech sites like AndroidPIT and Canaltech in Brazil, and now I share my insights with audiences around the globe—including in the US, Germany, France, Spain, and Brazil—through honest, hands-on reviews. Recently, I've shifted my focus toward digital health, with a keen eye on gender equality and closing the gender data gap. I'm passionate about using simple, clear storytelling to give women a stronger voice in both tech and health. Whether I'm testing the latest gadgets or exploring new trends in digital health, I always aim to break things down in a way that's easy to understand. On a personal note, I'm an active runner—I completed the Berlin Marathon in 2024—and I'm gearing up for a long bike trip from Germany to Austria in just four days in 2025.

Camila Rinaldi is familiar with the following topics: Robot vacuum cleaner, Mobility, Smartphones, E-bikes & e-scooters, Wearables, Fitness & Health, Smartwatches, Apps & Services, Tablets, Immersive technologies, Smart Home.

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