Samsung's Android 12 rollout to its lineup of devices continues, with the Galaxy Z Fold 2, Galaxy Note 20, and Galaxy S20 series being the latest to receive the stable One UI 4 update. Just a day ago, the Korean OEM resumed the One UI 4 rollout for its 2021 flagships after resolving some compatibility issues. Now that the groundbreaking bugs have been addressed, older models are also getting the sweet treat of Android 12.
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Galaxy S20
The One UI 4 stable update for the Galaxy S20 series is currently rolling out to users in the AUT region, which is Samsung's internal code for Switzerland. The new build, with the model number G98xxXXSCEUL7, is for the global variant of the Exynos-powered phone and brings the December 2021 security patches.
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Galaxy Note 20
Similarly, the Galaxy Note 20 series received the stable One UI 4 update in the form of software build N98xxXXS3EULF in Switzerland. Just like the latest beta, the stable version features the December 2021 SPL.
Galaxy Z Fold 2
While the beta testing phase of the Galaxy Z Fold 2 One UI 4 update was limited to South Korea, the first stable update has been released in Europe (via SamMobile). The release carries firmware version F916BXXS2FULE with the December 2021 security patch set. Samsung is expected to release the update to other markets in the coming weeks, but, as of now, the company has not released any official information about it.

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It is worth noting that the updates for the aforementioned devices are being rolled out in batches, so you may have to wait a few days before the update notification appears on your device. In case you haven’t received the OTA prompt on your device yet, you can head over to the Software Update section in the Settings app to check if the update is available for your device or not. You can also grab the One UI 4 stable build directly from the company’s Firmware Update Server (FUS) and install it manually on Galaxy device.
Information source: xda-developers.com
