
[March 21] Samsung March 2021 One UI and Security Patch Tracker
After introducing the latest version of One UI – One UI 3.1 at the Galaxy Unpacked 2021, Samsung delivered this update for the Galaxy Tab S7 and Tab S7+ tablets globally. On February 18, the company announced that it will send the One UI 3.1 update for several Galaxy flagships and mid-rangers.
So far, several Galaxy flagships including the Galaxy S20, Note 20, Fold 2/Flip have received the One UI 3.1 features over-the-air. And today (February 25, 2021), the Korean tech has initially released the One UI 3.1 changes for the Galaxy Note 10 phones in Germany.
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Along with the One UI 3.1, the Galaxy Note 10 also gets the March 2021 security patch. It makes the Galaxy Note 10 the first to collect the latest security update ahead of three days of the next month. On the other hand, Samsung is rapidly working to send the Android 11 update to its several eligible devices within the first half of this year.
Apart from the major/feature updates, Samsung also rolls out new security patches, bug fixes, system improvements, and new features for its different smartphones, tablets, and smart wearables every month.
In this tracker, we’ll put all the One UI and Security Patch updates which will be released in March 2021.
Samsung March 2021 Security Patch Device List: Sammy Fans
- Galaxy Note 10
- Galaxy Note 10+
- Galaxy S10e
- Galaxy S10
- Galaxy S10+
- Galaxy S21
- Galaxy S21+
- Galaxy S21 Ultra
- Galaxy S20 5G
- Galaxy S20+ 5G
- Galaxy S20 Ultra 5G
- Galaxy S20 FE
- Galaxy Tab S6
- Galaxy Tab S6 Lite
- Galaxy Note 20
- Galaxy Note 20 Ultra
- Galaxy S9
- Galaxy S9+
- Galaxy M31
- Galaxy Z Fold 2
- Galaxy Fold
- Galaxy Tab S7
- Galaxy Tab S7+
- Galaxy A30s
- Galaxy A20
- Galaxy M30
- Galaxy A21 [Verizon]
- Galaxy Note 9
Below, You Can Check March 2021 Feature and Security Updates: Sammy Fans
[March 27, 2021] – Samsung Galaxy Note 9 – March 2021 security patch
Samsung releasing the March 2021 security update to the Galaxy Note 9 users in the US as well as globally. Verizon | Global
[March 21, 2021] – Samsung Galaxy S20 Series – One UI 3.1 & February 2021 security patch
T-Mobile started sending the Android 11-based One UI 3.1 update to the Galaxy S20 series in the US. This update also includes the February 2021 security patch for better device security. Source
[March 20, 2021] – Samsung Galaxy Tab S7 – March 2021 security patch
Samsung Galaxy Tab S7 and Tab S7+ locked on Verizon carrier have begun collecting March 2021 security patch over the air. Source
[March 16, 2021] – Samsung Galaxy A30s and A20 – March 2021 security patch
Samsung’s two entry-level smartphones – Galaxy A30s and A20 are now receiving the March 2021 security update over the air. Source
[March 15, 2021] – Samsung Galaxy Fold and Z Fold 2 – March 2021 security patch
After bringing the One UI 3.1 features, Samsung pushed the March 2021 security update to the Galaxy Z Fold 2 and Galaxy Fold models.
[March 14, 2021] – Samsung Galaxy A42 5G – One UI 3.1
The Galaxy A42 5G has started getting the Android 11-based One UI 3.1 firmware update. Source
[March 13, 2021] – Samsung Galaxy M31 – One UI 3.1 & March 2021 security patch
Samsung’s popular Galaxy M31 is now updating to the One UI 3.1 version. This update also includes the March 2021 security patch. Source
[March 12, 2021] – Samsung Galaxy Note 20 [US] – March 2021 security patch
After the international variants, the Galaxy Note 20 series (without carrier branding) has begun receiving the latest security improvements released in March 2021 over the air. Source
[March 11, 2021] – Samsung Galaxy S9/S9+ – March 2021 security patch
Samsung started sending the March 2021 security update to the Galaxy S9 and S9+ smartphones. Source
[March 11, 2021] – Samsung Galaxy S20 FE [US] – One UI 3.1
The US unlocked Galaxy S20 FE getting the Android 11-based One UI 3.1 update. Source
[March 10, 2021] – Samsung Galaxy Note 20 – March 2021 security patch
After the US, the company has begun releasing the March 2021 security patch to the Galaxy Note 20 and Note 20 Ultra in more markets. Source
[March 07, 2021] – Samsung Galaxy A71 – One UI 3.1 & February 2021 security patch
The Galaxy A71 on One UI 2.5 started receiving the Android 11-based One UI 3.1 update along with the February 2021 security patch. Source
[March 04, 2021] – Samsung Galaxy Note 8 [Verizon] – January 2021 security patch
Verizon started releasing January 2021 security update to the locked Samsung Galaxy Note 8 devices in the US. Source
[March 03, 2021] – Samsung Galaxy Tab S6 and Tab S6 Lite – One UI 3.1 & March 2021 security patch
Samsung Galaxy Tab S6 and S6 Lite receiving the Android 11-based One UI 3.1 update. It also installs the March 2021 security patch. Source1 | Source2
[March 01, 2021] – Samsung Galaxy S20 – One UI 3.1 & March 2021 security patch
Samsung started releasing the One UI 3.1 update for the Galaxy S20 series devices in the US. Along with this, these phones are also receiving the latest March 2021 security patch. Source
[February 28, 2021] – Samsung Galaxy S21 – March 2021 security patch
Samsung Galaxy S21 series March 2021 security update is now live in select countries including Taiwan. It will soon be available in other markets. Source
[February 25, 2021] – Samsung Galaxy S10 – One UI 3.1 & March 2021 security patch
After the Galaxy Note 10, Samsung started to deliver the One UI 3.1 and March 2021 security update for the Galaxy S10 series devices. Source
[February 25, 2021] – Samsung Galaxy Note 10 – One UI 3.1 & March 2021 security patch
As promised, Samsung released the One UI 3.1 update for the Galaxy Note 10 devices alongside the March 2021 security patch. Source
* This article will be updated regularly.
One UI
Samsung Galaxy S24 vs S23: Five One UI 7.0 feature differences

Samsung has released One UI 7.0 for Galaxy S24 and S23 series devices, with new features and UI upgrades. Still, these firmwares have a few differences for respective users, and here’s what you will be getting in these two previous flagships.
- AI features
- Log video
- Motion photo capture
- Bixby UI
- Natural language Search
AI Features
One UI 7.0 redefines Galaxy AI for the S23 series, including the Drawing Assist feature that can generate new images and content. Better writing tools, fast interpretation with Interpreter, Note assist, Browsing assist, Photo assist and more.
Still, three AI features from S24 are missing from this update:
- Audio eraser – Removes distracting noise in video by adjusting the volume of voices, wind and other sounds
- Photo ambient wallpaper – AI wallpaper that changes based on the time and weather
- Health assist – Provides personalized insights and guidance based on your health data

S24 (Left), S23 (Right)
Log video
First introduced with the S25 series, Log video is absent from the S23’s camera app. It helps you record in log format to the camera preview. Log format captures a wider dynamic range for enhanced control over video properties. These types of videos look flat and gray until you correct their color in the Gallery app.

S24 (Left), S23 (Right)
Motion photo capture
Samsung phones are the first to bring motion photos, and One UI 7.0 has enabled an extra option that lets you customize with “Before and after shutter” and “Before shutter only”. Yet, the camera app in the S23 series set to only one option by default.

S24 (Left), S23 (Right)
Bixby UI
One UI 7.0 has redesigned Bixby’s home screen summon UI, including a screen expansion button on top and an input button on the right to type a query on the bottom side. A voice prompt button on the left helps you to start or stop the voice input. This UI looks better than the previous generation, which is still available in S23.

S24 (Left), S23 (Right)
Natural Language Search
Natural language search utilizes the phone’s generative AI power for extra assistance in search. Users can go into Settings and say “My eyes are feeling tired”. The results will show you options such as adjusting brightness or turning on the Eye comfort shield.
For some reason, this feature is not part of the S23’s One UI 7.0 release.

S24 (Left), S23 (Right)
Conclusion
The majority of One UI 7.0 shared between the Samsung Galaxy S24 and S23 are the same, but the ones that are missing in the latter model could be related to the chipset and image processing unit. Still, we can remain optimistic about a feature pack software update in the near future to add the missing capabilities on S23 models.
One UI
Surprise! Samsung Galaxy S21 starts receiving One UI 7 (Android 15) update

After several Galaxy S series smartphones, Samsung has finally started rolling out the One UI 7 update based on Android 15 for the Galaxy S21 series. This major update makes this series phones more useful, smarter, and secure.
Samsung Galaxy S21, Galaxy S21 Plus, and Galaxy S21 Ultra smartphones are getting the One UI 7 update with One UI build versions G991NKSU8HYD9, G996NKSU8HYD9, and G998NKSU8HYD9, respectively. Users will have to download a 3.5GB update package to install the update.
One UI 7 is based on Android 15, which is the last major update for Samsung Galaxy S21 series smartphones. These smartphones launched with Android 11 and have now received four major Android OS updates.
Samsung Galaxy S21 series has completed its Android OS update cycle with the One UI 7 update, and it is not eligible for the next OS update, Android 16. However, it is still eligible for security updates.
Notably, the One UI 7 update for the Galaxy S21 series is currently rolling out for users in Korea, and the company will soon expand it to more countries. This series. The update is rolling out gradually, so it may take some hours or days to reach all models.
Talking about One UI 7, the major update adds several new features and improvements to provide a better experience. It includes a vertical scrolling app drawer, redesigned icons, better widget customization options, larger home screen folders, and a new user interface.
Moreover, the update brings new designs for various apps, which further improve the overall look and feel of the system. Also, the update installs the April 2025 security patch to improve system security and stability.
If you are using any Galaxy S21 smartphone, install the update now via Settings >> Software Update >> Download and install. Follow the on-screen instructions to install the update and enjoy new features!
One UI
BREAKING: AT&T releases One UI 7 update for Galaxy S24 series in the US

Samsung Galaxy S24 series at AT&T starts receiving One UI 7.0 update in the US. This release was on hold since the company commenced the update rollout. The latest firmware also includes fixes for issues with the lock screen of your Galaxy.
Over the past two weeks, Samsung expanded the One UI 7 BYD9 build for the Galaxy S24 series worldwide. However, Galaxy S24, S24+ and S24 Ultra users at AT&T carrier were eagerly waiting for the Stable One UI 7 update in the US.
One UI 7.0 brings a refreshed UI, redesigned app icons, and smoother animations. It also improves one-handed usability for the camera app and enhances Galaxy AI features, making it a significant update for users.
The lock screen now includes the Now Bar, showing real-time updates like workout progress or music playback without unlocking. Smoother animations and a split Notification and Quick Settings panel improve navigation.
Call Transcripts transcribes recorded calls in up to 20 languages, simplifying note-taking during conversations. Besides, the AI Select suggests actions based on selected content, like adding events to your calendar from a screenshot.
The update’s firmware, version S92xUSQU4BYD9, is around 5GB for most users. Galaxy users can check for updates via Settings > Software update.
BREAKING ‼
🚨 AT&T finally starts Stable One UI 7.0 update rollout for the Galaxy S24 series in the US 🚀
BYD9 is available for S24, S24+ and S24 Ultra
It's time to upgrade your Galaxies 🤝@ATT @ATTHelp #OneUI7 #Samsung #Android15 #GalaxyS24 #GalaxyS24Ultra https://t.co/9foCnWkW9U pic.twitter.com/zTd38LUnRE
— Yash (@TweetToYash) April 29, 2025
On April 10, Samsung expanded the One UI 7 update to Europe and the US. The initial rollout happened on April 7 in South Korea, where Galaxy S24 users encountered severe unlock bugs, leading the entire distribution to be pulled.
Samsung took some time in officially acknowledging the bug, and of course a backlash on social media. Users were in no mood to defend their favorite smartphone maker as they were awaiting the One UI 7 update despite an unacceptable delay.
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From Sammy Fans YouTube
One UI
Back swipe gesture in One UI 8 gets visual polish with predictive effect [Gallery]

An updated One UI 8 build has brought subtle visual improvements to the back swipe gesture. The new predictive swipe feature aims to make navigation smoother and more intuitive. Let’s explore what’s changing between One UI 7 and One UI 8.
In the latest One UI 7 version, the back swipe showed a simple arrow sliding from the screen’s edge. Looking ahead, the upcoming Android 16-based One UI 8 is expected to introduce a dynamic glow effect along the edge.
This subtle highlight in One UI 8 acts as a clearer visual cue. It helps users see when the back gesture is recognized, improving confidence while navigating. The updated animation feels more modern and polished compared to One UI 7.

Image: One UI 7.0 vs One UI 8.0 – Back Swipe Gesture | Source – SamMobile
The predictive swipe in One UI 8 enhances the back gesture system. It anticipates user actions, reducing accidental triggers during navigation. This means fewer mistakes when swiping back, making the experience feel more natural and responsive.

Image: One UI 8.0 Back Swipe Gesture | Source – SamMobile
The predictive swipe may also improve functionality. It could better differentiate between a back swipe and other edge gestures, like opening the side menu. This reduces navigation errors, offering a more seamless user experience overall.
Do note that this different back swipe gesture is spotted in an internal One UI 8 build. The company may further improve and abandon it throughout the testing. Things may clear even further in the public Beta Program, probably starting this August.
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Have a hot tip or just want to chat tech? I’d love to hear your feedback or tips—connect with me on X/Twitter @TweetToYash!
X/Twitter DMs are also open for tips, suggestions, and feedback – DM Yash on X (open to followers).
One UI
Samsung gives Email app a makeover to match One UI 7 design

Samsung has started rolling out the new One UI 7 update to several Galaxy devices, and with it comes a fresh design for the Samsung Email app. This update brings a cleaner look and some small changes that make the app easier to use.
Previously, Samsung made a minor update that only added some extra space in the settings menu. But now, a major update is here that improves how the app looks and feels.
With One UI 7 support, Samsung has improved the layout of its Email app. The spacing in the app is now more even, which makes everything look neat and easier to read.
The hamburger menu now shows which tab is active with a new background color. This makes it easier for users to see where they are in the app. Also, when you write an email or set up an event, the background is darker. This helps you focus better and makes the text easier to read.
- Image via SammyGuru
The Email widget has also been updated. It no longer has borders, so it looks more modern and matches the style of One UI 7. But there’s one thing missing: the blur or frosted glass effect that is used in other Samsung apps. This makes the design feel a little unfinished.
There are also some small design issues, like the corners in the settings menu are not rounded properly. Even with these small problems, the update is a nice improvement.
The Samsung Email app now matches better with the new One UI 7 design. You can download the latest update of the Samsung Email app through Galaxy Store >> Menu option >> Updates
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