UPDATE 2
According to the latest information, Samsung found some severe performance-related issues and working very rapidly to fix them as soon as possible. In order to find and fix those bugs, Samsung has delayed the One UI 4 Beta rollout to October.
UPDATE 1:
Samsung has started the One UI 4.0 beta program for the Galaxy S21 series users and now can enroll for the One UI 4.0 beta through the Samsung Members app, currently only in Korea.
Original Article: July 28, 2021
Earlier today, Samsung announced on its own forum that it will soon launch the One UI 4.0 beta program for the Galaxy S21 series.
However, Samsung did not say when it will launch a test version. The only certainty is that Samsung One UI 4.0 will be developed based on Android 12.
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According to a new report, Samsung has confirmed that the Android 12-based One UI 4.0 beta program will begin in September. The One UI 4.0 beta program will initially be limited to owners of Samsung’s Galaxy S21 series phones.
If it gets true, you can expect the stable One UI 4.0 update to hit the Galaxy S21 series before the end of the year.
Last year, Samsung started the Android 11-based One UI 3.0 beta program for the Galaxy S20 series in early October. After two months of testing, the company rolled out the stable One UI 3.0 to the Galaxy S20 series.
Samsung is likely to expand the One UI 4.0 Beta program to several Galaxy smartphones, including the Galaxy S20, Note 20 series, and upcoming Galaxy Z Fold 3/Flip 3.