In July last year, a commit to AOSP Gerrit had suggested that Google was finally preparing to make Android’s seamless updates feature mandatory on all phones with Android 11. Unfortunately, however, it appears Samsung’s best Android phones of 2021 do not support the useful feature (via 9to5Google).
Max Weinbach from Android Police noted on Twitter that he couldn’t find “ro.virtual_ab” anywhere in the system image from a Galaxy S21. Third-party apps Treble Info and Treble Check also suggest the Galaxy S21 devices lack support for seamless updates.
Android’s seamless updates feature makes use of A/B partitions to install updates in the background, making it possible for you to continue using your phone while it is being updated. There is also a lower risk of data corruption during an update with seamless updates.
As per XDA Developers Editor-in-Chief Mishaal Rahman, Google may have planned to require support for seamless updates with Android 11, but changed its mind for some reason.
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