Surprise! Samsung has released the One UI 7 update for the Galaxy S21 series earlier than anyone expected. These 2021 flagships were officially scheduled to receive Android 15-based One UI 7 in May — but in a pleasant twist, Samsung has started rolling it out already, continuing its streak of early updates for multiple Galaxy devices this week.
The update is now live in South Korea and should make its way to more countries very soon. Galaxy S21, S21+, and S21 Ultra users in Korea can download One UI 7 update that’s tagged with the firmware version G99xNKSU8HYD9. The OTA package weighs around 3.5GB, as shared by Tarun Vats on X. This is a big update, packing a refreshed interface, smoother performance, and all the latest features Samsung has baked into its Android 15 skin.
But today’s rollout isn’t just about early surprises—it’s also a major milestone. One UI 7 marks the final OS upgrade for the Galaxy S21 lineup. These phones launched with Android 11 back in 2021 and have now completed their promised run of four Android upgrades. While Samsung will continue to offer quarterly security updates for a bit longer, the end of the road is in sight.
So yes, it’s time for Galaxy S21 users to savor the moment. One UI 7 is the last big update for your phone—and it’s a solid one. You’re getting a polished UI, better customization, and refined animations across the system, plus more Galaxy AI smarts (though limited compared to newer flagships).
To see if the update is available for your device, head to Settings > Software update > Download and install. If it’s there, hit download and enjoy the ride—this is the last time your Galaxy S21 will feel brand new again.
