As per a source, Samsung Galaxy M21 began getting the Android 11-based One UI 3.0 update in India. The first country to receive the over-the-air (OTA) upgrade is said to be India, but it is likely to extend shortly to other areas. In addition to One UI 3.0 and Android 11 features, the upgrade carries the January 2021 Android security patch to the Samsung Galaxy M21. Several of Samsung’s premium smartphones have been updated to the newest platform and some mid-range models.
As per a post by SamMobile, the Android 11-based One UI 3.0 update for the Samsung Galaxy M21 carries the firmware variant M215FXXU2BUAC. Although it currently appears to be rolled out only for smartphones in India as of now, it is likely to be available in other regions soon for Samsung Galaxy M21 devices as well.
f you have a Samsung Galaxy M21 in India and haven’t received a notification regarding the update yet, you can check for it manually. Go to Settings > System updates > Check for system updates > Download now > Install update. However, the One UI 3.0 update is likely to be carried out in a stage-based way, and it may be a few days before it is obtained by your computer.