Samsung`s Galaxy S21 doesn`t support seamless updates
(Android Police)

And unfortunately Google's CDD for Android 11 doesn't list it as a requirement Last year, a change to the Android 11 Vendor Test Suite was spotted, indicating that phones launching with Android 11 and later would be required to support so-called `seamless` updates. This feature allows a phone to install a system update while it`s running and simply reboot into the new environment without any user-facing delay. Unfortunately, that hasn`t panned out. According to the latest Android 11 Compatibility Definition Document (CDD), Google has seemingly walked back that requirement, and we can confirm that the Samsung Galaxy S21 doesn`t support seamless updates. Read More Samsung`s Galaxy S21 doesn`t support seamless updates was written by the awesome team at Android Police.