Android 12 stable rollout resumes for Galaxy S21 series, Z Flip3, Z Fold3

has been beta testing One UI 4.0 based on 12 for its devices for months. Some of them even started receiving the stable update in November. However, the rollout did not go as expected due to issues. Now, over a month later, the South Korean tech giant has finally fixed those problems and has begun seeding the stable update once again.

The stable 12-based One UI 4.0 was first made available for the Galaxy S21 series comprising of Galaxy S21, Galaxy S21+, and Galaxy S21 Ultra. The update was later rolled out for the Galaxy Z Flip3 and the Galaxy Z Fold3.

As mentioned earlier, the update rollout for the aforementioned handsets was halted due to bugs. seeded out yet another stable release but unfortunately, that also had issues.

It turns out that the compatibility between Play System and One UI 4.0 was responsible for the reported issues. The world’s largest smartphone brand has now fixed (via XDA Developers) this problem with the help of a patch from Google.

Hence, the company has now kicked off the One UI 4.0 stable update rollout for the above-mentioned phones with the fix. The update arrives with December 2021 security patches and the following firmware numbers.

  • Galaxy S21 Series

    • Global: G99xBXXS3BULC
    • Korea: G99xNKSS3BULC
  • Galaxy Z Flip3, Fold3

    • Global: F711xxxS2BUL6
    • Korea: F926xxxS1BUL6


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