Modern Xiaomi and Redmi smartphones are equipped with reliable biometric protection systems, among which fingerprint scanning is the leading one. This technology not only speeds up access to the device, eliminating the need to enter a pattern lock or digital code, but also significantly increases the level of privacy of your data. Device owners often look for ways to activate this feature, since by default it can be disabled for the sake of initial security settings.
The process of adding biometric data to a MIUI or a new HyperOS system is as intuitive as possible and takes only a few minutes. However, users sometimes find it difficult to register a finger if they do not comply with certain conditions, such as the purity of the scanner surface or the correct angle of inclination. Understanding the intricacies of the fingerprint module will avoid errors in the first setup.
In this article, we will take a closer look at the algorithm for activating unlock, look at advanced security settings, and answer frequent questions, learn how to add multiple fingerprints, configure the contents of notifications, and what to do if the scanner has stopped responding to touch.
Preparation of the device for setting up biometrics
Before you start directly registering a fingerprint, you need to make sure that a reliable digital password is installed on the device, PIN-Android requires a backup unlock method in case the scanner can't read your finger, such as after a device reboots or if your skin is damaged.
It is also worth checking the cleanliness of the scanner area, whether it is embedded in the on button on the side face or located on the back panel under the camera. Fat marks, dust or moisture can significantly reduce the speed and accuracy of the reading.
⚠️ Note: Do not attempt to register a fingerprint if your hands are wet or sweaty, as this will lead to an incorrect pattern and unlock problems in the future.
Make sure that there is no screen screen screen screen covering the scanner area if you are talking about models with subscreen sensors. For side scanners, it is important that the case does not interfere with the free access to the button. Quality preparation will eliminate most of the typical mistakes that beginners face when they first get acquainted with the function.
Step-by-step instructions for activating the scanner
To get started, you need to go to the appropriate settings menu. The interface may vary slightly depending on the firmware version, but the logic remains the same for all Xiaomi, Redmi and POCO models. Open the Settings app and find the Passwords and Security section. This is where all the device access management tools are concentrated.
In the menu that opens, select "Unlock by fingerprint." The system will request a previously set password or pattern lock to verify your identity. Once you have successfully logged in, you will see a screen prompting you to add a fingerprint. Press "Add fingerprint" to start the scanning process.
☑️ Checklist before scanning
Follow the instructions on the screen, putting your finger on the sensor in different areas. Don't hold your finger statically; slowly change the angle of inclination by touching the edges and center of the pad. The system will display progress in filling the scale, and for maximum accuracy, it is recommended to pass this step twice for each finger.
Advanced Settings and Security Parameters
Once you successfully add a fingerprint, you'll have additional options to fine-tune the function. In the "Additional Settings" menu, you can activate unlock when the screen is off, allowing you to instantly access the device with a simple touch, bypassing the swipe step, a feature that is particularly convenient for daily use.
The “Hide Content” option, which prevents notifications from being viewed on a locked screen until they are successfully identified, is a critical parameter for protecting sensitive information from prying eyes in public places, and allows the use of fingerprints for authorization in applications and payment systems.
- 🔒 Privacy of Notifications: Hiding text before unlocking.
- 🚀 Quick Start: allows you to open applications with a double touch on the fingerprint.
- 📱 Navigation: Using the scanner area as a virtual home button».
- 💳 Payment: Authorization in Google Pay and banking applications.
⚠️ Warning: Quick unlock when the screen is off may not work properly with thick protective glass, reducing the sensor response speed.
Some models support the Advanced Unlock feature, which uses artificial intelligence algorithms to adapt to changes in the condition of your finger skin, which is especially true if you often exercise or work with your hands, which can temporarily change the pattern of papillary lines.
Adding multiple prints for convenience
The system allows you to save up to five different fingerprints, which opens up a lot of possibilities for use. You can register your fingers with both hands, which allows you to comfortably unlock your smartphone with either hand, which is especially convenient in transport or when the second is occupied by a bag or a child.
In addition, many users add a fingerprint of a loved one or a trusted person in case of an emergency, and while this reduces personal security, in some family scenarios, this approach is justified. Simply select Add a fingerprint again and follow the standard procedure for a new finger.
For each fingerprint you add, you can give your name, like "Left Large" or "Right Index," which will help you avoid getting confused in the list if you decide to delete or edit a specific template in the future.
Solving common problems with the scanner
Sometimes users are faced with a situation where the scanner stops responding or is working with errors. Often the cause is a software failure that can be fixed by restarting the device. If the problem persists, try to remove the saved fingerprint and register it again, paying special attention to the edges of the finger pad.
In cases where unlocking is unstable, it makes sense to check for system updates. Xiaomi engineers regularly release patches that improve the performance of biometric sensor drivers. Go to Settings → About Phone → MIUI version and click the update check button.
| Problem. | Possible cause | Method of decision |
|---|---|---|
| The scanner is not responding. | Sensor contamination | Wipe the surface with a soft cloth |
| Frequent reading errors | Poor registration | Remove and add the print again |
| Slow reaction | Cache overflows | Clear cache or restart your phone |
| Doesn't work in a case. | Thick side of the cover | Remove the cover or replace it with a thinner one |
If the software methods don't work, there may be a hardware malfunction of the module, which requires an authorized diagnostic service center, and disassembling the device on your own can lead to a loss of warranty, so it's best not to take any risks.
The impact of protective accessories on the operation of the sensor
The use of protective glasses and covers is a dual factor, on the one hand, they protect the device, on the other hand, they can create physical obstacles for the scanner, especially for models with subscreen sensors, where the thickness and quality of the glass play a critical role.
For side scanners built into the power button, it is important that the notch in the case matches the shape of the button. If the case covers part of the sensor, the contact area of the finger decreases, which leads to errors. In such cases, it is recommended to either change the accessory or increase the sensitivity in the settings, if such an option is available.
How to choose a glass for a subscreen scanner?
There's a myth that matte films make the scanner worse than glossy films, and in practice, the difference is minimal if the film is good quality and properly pasted without bubbles in the sensor area, and the key is to avoid damaging the most protective coating in the scanning area.
Security of biometric data in MIUI and HyperOS
Many users are wary of storing their biometrics in their smartphone memory, but Xiaomi devices use a dedicated TEE (Trusted Execution Environment) secure module, which does not transfer fingerprints to the company's servers or save them in the cloud, remaining exclusively encrypted inside the device.
Even when root permissions are granted, third-party applications are locked away at the hardware level, meaning that a virus or malware cannot pull out your finger image, but it’s worth remembering that biometrics are easier to fake physically (such as using a cast) than to steal a digital password.
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Use the App Protection feature in your security settings to require a fingerprint not only to log in to your phone, but also to run specific programs like a gallery or instant messengers.
Newer versions of HyperOS have improved encryption algorithms, making it even more resistant to hacking, and regular software updates ensure that you are using the most up-to-date security protocols available at the moment.
Comparison of Unlocking Methods on Xiaomi
Fingerprint, modern smartphones offer face unlock and password entry. Each method has its own advantages. Fingerprint remains the gold standard because of the balance between speed and reliability. Face unlock is convenient, but can work worse in low light.
pattern lock or PIN-Code is the most reliable but slow method, and it's recommended to use it as a backup, and the combination of methods allows you to create a flexible security system that fits your use case.
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The best security strategy is to use a fingerprint for daily unlocking and a complex 6+ character password as a backup key.
The choice of the main method depends on your habits: If you often wear gloves or work in an environment where your fingers may be contaminated, a facial unlock or password will be more appropriate, otherwise fingerprinting provides the best user experience.