Tips
Galaxy S21 Tip: Learn Biometric security [Samsung Android 12/One UI 4]

Samsung One UI 4.0 is now available for the Galaxy S21 series (as Beta testing activity) in select countries, which is based on Google’s Andriod 12 operating system. The beta program allows users to experience the upcoming OS ahead of the stable launch.
With One UI 4 Beta 2, Samsung has made various adjustments to the user interface and functions. In addition to new features, it also enhances the security and privacy of smartphones. So, in this article, we will discuss how you can enable biometric security on the Galaxy S21 smartphones.
What is Biometric security?
Biometric security provides a more convenient but less secure device confirmation method. Under the hierarchical authentication model, primary authentication (that is, patterns based on knowledge factors, such as PINs, patterns, and passwords) provides the highest level of security. Biometrics is the second layer of identity verification, providing a balance between convenience and security.
Biometric security includes:
- Face recognition
- Fingerprint scanner
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How to enable Face recognition on Galaxy S21 series?
You can enable Face Recognition to unlock your screen. To use your face to unlock your device, you must set a pattern, PIN, or password.
- Face recognition is less secure than Pattern, PIN, or Password. Your device could be unlocked by someone or something that looks like your image.
- Some conditions may affect face recognition, including wearing glasses, hats, beards, or heavy make-up.
- When registering your face, ensure that you are in a well-lit area and the camera lens is clean.
Steps:
- From Settings, tap Biometrics and security > Face recognition.
- Follow the prompts to register your face.
Face recognition management:
Customize how face recognition works.
- Go to the Settings
- tap Biometrics and security
- Face recognition.
- Remove face data: Delete existing faces.
- Add alternative look: Enhance face recognition by adding an alternative
appearance. - Face unlock: Enable or disable face recognition security.
- Stay on Lock screen until swipe: When you unlock your device with face
recognition, stay on the Lock screen until you swipe the screen. - Faster recognition: Turn on for faster face recognition. Turn off to increase security and make it harder to unlock using an image or video of your likeness.
- Require open eyes: Facial recognition will only recognize your face when
your eyes are open. - Brighten screen: Increase the screen brightness temporarily so that your face can be recognized in dark conditions.
- About unlocking with biometrics: Learn additional information about securing your device with biometrics.
How to use Fingerprint scanner on Galaxy S21 series?
Use fingerprint recognition as an alternative to entering passwords in certain apps. You can also use your fingerprint to verify your identity when logging in to your Samsung account. To use your fingerprint to unlock your device, you must set a pattern, PIN, or password.
- From Settings, tap Biometrics and security > Fingerprints.
- Follow the prompts to register your fingerprint.
Fingerprint management:
Add, delete, and rename fingerprints.
From Settings, tap Biometrics and security > Fingerprints for the following options:
- The list of registered fingerprints is at the top of this list. You can tap a fingerprint to remove or rename it.
- Add fingerprint: Simply follow the prompts to register another fingerprint.
- Check added fingerprints: Scan your fingerprint to see if it has been registered.
Fingerprint verification settings:
Use fingerprint recognition to verify your identity in supported apps and actions.
- From Settings, tap Biometrics and security > Fingerprints for the following options:
- Fingerprint unlock: Use your fingerprint for identification when unlocking your device.
- Fingerprint always on: Scan your fingerprint even when the screen is off.
- Show icon when screen is off: Show the fingerprint icon when the screen is off.
- Show animation when unlocking: Show an animation when you use fingerprint verification.
- About unlocking with biometrics: Read details on the requirements each biometric security feature has for using your pattern, PIN, or password as a backup.
Biometrics settings
Configure your preferences for biometric security options.
- Click on Settings
- Tap Biometrics and security
- Click on More biometrics settings for the following:
- Show unlock transition effect: Show a transition effect when you use biometrics to unlock your device.
- Biometrics security patch: View the software version of the biometric security features.
Tips
Here’s how to easily apply a screen protector to your Samsung Galaxy S25

Samsung Galaxy S25 series is now reaching customers who pre-ordered it. If you’ve just gotten your new phone, it’s important to protect its screen from scratches and damage. Attaching a screen protector to your Samsung Galaxy S25 is a simple and effective way to keep it safe and ensure long-lasting protection.
The package for the Samsung Galaxy S25 screen protector includes two protective films, an applicator, two dust removal stickers, an attachment guide, a microfiber cloth, and a squeegee.
You can easily apply a screen protector to your Galaxy S25 smartphone, just need to follow a few easy steps.
Step 1:
Start by removing the protective tape from the applicator. Fix your phone securely into the applicator and press firmly to keep it in place. Then, use the microfiber cloth to clean the screen thoroughly, removing any dirt or fingerprints.
Step 2:
Take one of the dust removal stickers and gently use it to eliminate any remaining dust or foreign substances from the screen. This will ensure the protector sticks properly without bubbles or imperfections.
Step 3:
Carefully peel the first protective film labeled 1 from its backing, located near the middle. Turn the film over and place it on the screen, securing it in the applicator’s groove. Be cautious not to touch the adhesive side. Align the camera hole with the top of the phone screen and press gently to fix it temporarily.
Step 4:
Once the protector is in place, use the squeegee to remove the blue protective tape, ensuring it sticks to the screen. Carefully remove the applicator by lifting the bottom part of the film and pulling the applicator down.
Step 5:
Repeat the process with the other part of the protective film for the lower part of the screen. Use the squeegee to push the film from left to right to ensure it is fixed securely.
Step 6:
Peel off the transparent protective film and wipe the screen with the microfiber cloth to remove any streaks. If a line appears in the center of the screen, don’t worry this will fade after a short period.
Check the video here:
Tips
Go back to stability: Downgrading from One UI 7 Beta to stable One UI 6.1 on Galaxy S24 in the US

The One UI 7 beta program specifically rolled out for the Samsung Galaxy S24 series in the US, promised early access to new features and improvements. However, beta software often comes with some bugs, glitches, and performance issues which can lead to frustration.
Trying new software might seem fun initially, but it can get old fast if it makes your phone less reliable. Since we don’t know when One UI 7 will be stable, returning to One UI 6.1 is a smart choice for many.
Here’s a step-by-step guide to downgrade your Galaxy S24 from One UI 7 Beta back to One UI 6.1:
1. Backup Your Data:
- Before you start, ensure all your data is backed up. Use the Samsung Smart Switch on both your phone and a computer to save your photos, contacts, apps, and settings.
- Connect your phone to the computer via USB, open Smart Switch, and select ‘Backup’.
2. Withdraw from the Beta Program:
- Open the Samsung Members app on your phone.
- Look for the One UI Beta Program status in the settings or at the top of the app.
- Select “Withdraw” and follow the prompts. This step ensures you won’t receive further beta updates.
3. Use Smart Switch to Downgrade:
- After withdrawing from the beta, go back to Smart Switch on your computer.
- With your phone still connected, you should now see a “Downgrade” option. Click on it.
- Confirm the downgrade process by accepting the terms and conditions. Smart Switch will then download and install the stable One UI 6.1 firmware.
4. Reset Your Phone:
Note that this process will perform a factory reset. Once the downgrade is complete, your phone will reboot into recovery mode where you will need to select ‘Wipe data/factory reset‘ to finalize the process.
5. Restore Your Data:
After the reset, use Smart Switch again to restore your backed-up data to your phone.
Important:
This method is for Galaxy S24 users who enrolled in the beta via the Samsung Members app. If you manually flashed the beta (using methods like Odin), you might need to flash back to One UI 6.1 using the same tool.
Why go back to the stable version?
Going back to One UI 6.1 ensures you have a more reliable and smoother experience with your phone until Samsung rolls out the stable One UI 7 version. It is about returning to a version where everything just works fine, avoiding any bugs from beta software.
Tips
One UI 7 Instant Slow-Mo: How to create epic videos with Galaxy S25 Ultra?

Samsung Galaxy S25 series features enhanced One UI 7 Instant Slow-mo feature. It’s an effortless way to create epic videos using the Galaxy S25 smartphone with just a tap. It ends the need for any third-party app and time consumption in editing.
You can trigger the One UI 7 Instant Slow-mo feature within the Gallery viewfinder. While playing a video, you just need to play a selected part of the video, with tapping and holding turns the simple video into a masterpiece that can be saved as a copy.
Here’s how you can leverage this feature to create epic videos:
Step 1: Capture Your Video
- Start by recording a video with your Galaxy S25 Ultra. The video can be of any action or scene that you think would look impressive in slow motion.
Step 2: Open the Video in the Gallery
- Head towards the Samsung Gallery app on your Galaxy S25 Ultra and find the video you just recorded or any video you wish to edit.
Step 3: Engage Instant Slow-Mo
While playing the video, simply touch and hold anywhere on the screen. This action will automatically engage the Instant Slow-Mo feature, slowing down the video to create a dramatic effect.
Step 4: Adjust and Preview
- As you hold your finger on the screen, you can move it to adjust the portion of the video you want in slow motion. The video will play in slow motion, allowing you to see the effect in real time.
Step 5: Save the Slow-Mo Clip
- To save your creation, look for an option to save the slow-motion clip while you’re still holding the screen. It appears as a button or prompt on the screen, tapping on it saves your video with the applied slow-motion effect.
Step 6: Share Your Epic Video
After saving, you can share your slow-motion masterpiece through various social media platforms or messaging apps directly from the Gallery app.
Note that some videos may not be supported by Instant Slow-mo due to file type. You won’t have any issues with videos recorded by the Galaxy camera. The feature leverages AI so the results may not be as expected all the time.
Tips
Here’s how to keep your Galaxy Watch 4/5/6 workout screen active

Many Samsung Galaxy Watch 4/5/6 series users have encountered an issue where the exercise screen doesn’t stay on during workouts, switching back to the watch screen. This issue is causing frustration among users, especially when users want to keep track of their progress in the middle of their workout.
Samsung has acknowledged the issue and shared that the root cause of this problem is in the notification settings for the Samsung Health app on your Galaxy Watch running Google Wear OS 5.0. With the Wear OS, Google has upgraded its notification policy, which is causing issues on Galaxy Watch 4/5/6.
When the notification setting for the Samsung Health app is Off, the watch screen switches to the home screen during workouts. The ‘Workout in progress’ icon does not appear at the bottom center of the screen due to the disabled setting.
Fortunately, this issue can be resolved by making sure that notifications for the Samsung Health app are enabled. For that, make sure your watch and phone are connected. Now, open the Galaxy Wearable app on your phone and go to Watch Settings >> go to Notifications >> select App notifications >> turn on Samsung Health.
To allow notifications on Samsung Watch Health, you just need to follow a few steps. From the watch home screen, swipe down and select the Settings icon. Now, Go to Apps >> select App List >> Select the Samsung Health app >> go to Permissions and make sure Notifications are allowed.
By following these steps, your exercise screen will stay on during your workouts to make it easier to track your progress.
Apple aims to integrate Satellite Connectivity in Watches: Will Samsung follow?
Tips
One UI 6 Watch: Here’s how to use Sleep Apnea feature on your Galaxy Watch

Samsung introduced a Sleep Apnea tracking feature with the Galaxy Watch 7 series. The company is now making the Sleep Apnea feature available for other Galaxy Watch models with One UI 6 update. Here, you can check how to enable and use this feature.
Sleep apnea is a condition where a person’s breathing becomes shallow or stops while they sleep. It’s a serious issue that can affect overall health. With the new feature, Samsung aims to help users easily detect if they might have sleep apnea.
To use this feature, you’ll need the Samsung Health Monitor app on your Samsung phone. Here’s how you can enable it:
- Open the Samsung Health Monitor app on your connected phone and go to the Sleep Apnea tab.
- If you don’t see the app on your phone, start it from your watch first.
- Enable the Sleep Apnea feature by turning on the switch and following the prompts.
Make sure to wear your Galaxy Watch while you sleep. In the morning, open the Samsung Health Monitor app again to view your results in the Sleep Apnea tab. You can also tap “View history” to see your recorded sleep data.
This new feature gives users important insights into their sleep health. By offering an easy way to detect signs of sleep apnea, it can help users take steps toward better health.
For more detailed instructions, you can also check “the Instructions for use” section in the Samsung Health Monitor app. If you have the Galaxy Watch running One UI 6 Watch update, you can try out this feature.
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