Yes, the Samsung Galaxy S21 Ultra is eligible for the Android 15 update and One UI 7 . Samsung has committed to providing four major Android OS updates and five years of security updates for its flagship devices.
The Galaxy S21 Ultra launched with Android 11, meaning it is expected to receive Android updates through Android 15, which would also include One UI 7. This would be the final major OS update for the device, and after that, it will continue to receive security updates for an additional year.
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