Modern smartphones, including the popular Xiaomi Redmi Note 8, offer users a variety of ways to protect personal data. One of the most convenient and reliable features is biometric fingerprint unlock. This not only speeds up access to the device, but also significantly increases the level of privacy by replacing complex graphic keys or passwords with a simple touch. Owners often wonder how to properly activate this option so that the system works without crashes.
The MIUI shell tuning process is intuitive, but it has some nuances that are important to consider to achieve maximum read accuracy. The scanner on the back requires a certain technique to apply your finger during calibration. If you ignore these details, you may have difficulty unlocking in future stressful situations or in low light, which is why you should approach the initial setup as responsibly as possible.
In this article, we will take a closer look at each step of activating biometrics, review security settings, and give you tips on how to improve the sensor, how to add a second finger for convenience, and what to do if the device no longer recognizes the owner.
Preparation of the device for biometric authorization
Before you start setting up the scanner directly, you need to make sure that the system is ready to make changes to the security settings. Usually, to activate the fingerprint function, you need to install the device. PIN-A code, pattern lock or password is a requirement of the Android operating system, which serves as a backup login method in the event of a biometrics failure.
If you haven’t installed screen protection before, the system will automatically redirect you to the appropriate menu when you try to turn on the scanner. It is recommended to choose a digital code of 6 or more characters, as it is more difficult to find than a simple graphical pattern. After installing the code, you can go to the main settings menu, where all the security management tools of your gadget are located.
⚠️ Warning: Make sure the back of the smartphone and the finger itself are dry and clean before setting up, otherwise the calibration may not be correct.
It is also worth checking whether the "Gloves" mode or other specific display settings that can theoretically affect the performance of the touchscreen are currently on, although this rarely affects the rear scanner, the main thing is to ensure that the system is stable at the time of the changes.
Step-by-step instructions for activating the scanner
To start the fingerprint unlocking process, you need to go to the settings menu, and you can do this in two ways: through the gear icon on your desktop, or by lowering the notification curtain and selecting the appropriate item. In the list that opens, we look for the passwords and security section, and this is where all the security tools for your Xiaomi are concentrated.
Inside the menu, select Unlock by fingerprint. The system will ask you to confirm your actions by entering the previously installed PIN-If you're successful in logging in, you'll see a switch that you want to activate, and if you click on it, the smartphone will suggest you add your first fingerprint.
☑️ Checking before setting up
Then the scanning process will begin. You will need to repeatedly apply your chosen finger to the sensor located under the camera on the back cover. Do not change your finger during the recording process until the system asks for it, otherwise the data will be stored incorrectly. Try to touch the sensor with different parts of the finger pad, changing the angle of inclination so that the system remembers the maximum surface area.
Calibration subtleties and the addition of multiple profiles
The quality of the recognition depends on how much you used your finger in the recording, and you don't just have to put your finger in the same position quickly, you'd better slowly move your finger around the surface of the scanner, slightly shifting the center of gravity to grab the edges of the pad, which is especially true for people who carry a phone in their pocket and may touch the sensor by accident.
The MIUI shell allows you to add up to 5 different fingerprints, which is a very useful feature that you should not ignore. You can write the same finger twice under different names (for example, "Finger 1" and "Finger 1 copy"), which will significantly increase the likelihood of successful unlocking, and you can add fingers from both hands for ease of use of the phone in any situation.
- 👍 Write down the thumb of the hand you normally hold your smartphone with – this is the most common use case.
- 👍 Add the index finger of the second hand for situations when the phone is lying on the table.
- 👍 Use the fingerprint duplication function to increase the system response speed.
Once the recording is complete, the system will suggest setting up additional actions, such as as setting up certain applications or modes to run with prolonged pressing on the scanner, but first, make sure that the basic unlock works consistently at different angles of the device.
Additional settings and security features
The fingerprint management menu hides a number of useful options that often go unnoticed, one of which is the ability to unlock the screen with a device that lies on the surface, which can be disabled by default for security reasons, but activating it adds comfort to everyday use.
You can also pay attention to the notification settings on the locked screen, so you can only allow the content of messages to be displayed after successful biometric authorization, which will prevent unauthorized people from reading personal information, even if they see pop-up notifications on the lock screen of your Redmi Note 8.
| Parameter | Description of function | Recommendation |
|---|---|---|
| Unlocking | Access to the fingerprint system | Included. |
| Add a print. | Recording a new profile | Up to 5. |
| Delete everything | Resetting all stored data | At sale |
| Long pressing | Launching applications | If you wish, |
Remember that biometric data is stored in a secure processor module and is not transferred to the company’s servers or third parties, but when selling a device or transferring it to another user, it is necessary to completely clean these fingerprints through the settings menu.
Solution with fingerprint recognition
Sometimes users are faced with a situation where the smartphone no longer recognizes the previously saved finger, this can be caused by contamination of the scanner, the presence of a protective film that covers the sensor, or simply a failure in the software, first of all, you should wipe the scanner area with a soft cloth without pile.
If mechanical cleaning didn't work, try removing the old print and rewriting it, paying more attention to the edges of the finger pad, sometimes writing the same finger as a new profile called "Finger 2" can help. MIUI, When recalibration is required.
⚠️ Warning: If the scanner has stopped responding fully (no vibration when touched), the plume inside the case may have moved away after falling and repairs are required.
In rare cases, the cause is a glued protective glass too thick, which distorts the sensor signal, in such a situation, you can only remove the protection or use alternative login methods, such as password or face unlock, which is also available in the Xiaomi Redmi Note 8.
Comparison of protection methods and final recommendations
A fingerprint remains one of the fastest ways to unlock, but it's not without its drawbacks. Unlike facial recognition, the scanner works even in complete darkness, but can flounder in wet hands. Face ID is more convenient when hands are busy, but less safe and doesn't work in the dark without screen lighting.
For maximum protection, experts recommend a combined approach: the main method is to make a fingerprint for speed, and keep a pattern lock or a complex password in memory as a backup option, which will ensure a balance between everyday usability and reliable protection of your data from unauthorized access.
- 🔒 Regularly update your security system through the update menu.
- 🔒 Periodically check the relevance of recorded prints.
- 🔒 Do not store photos of passport data in the gallery without additional protection.
Compliance with simple usage hygiene and timely security features will make your Xiaomi Redmi Note 8 a reliable assistant.A properly configured fingerprint scanner saves time and nerves by providing instant access to your apps and contacts at any minute.
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If you wear a case with protruding sides, make sure it doesn’t cover the scanner area, otherwise you’ll have to remove the protection each to unlock.
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The quality of unlocking depends 90% on how varied your finger was when you first recorded your fingerprint.