Modern Xiaomi smartphones offer users many ways to protect personal data, but it is biometric methods that remain most popular due to their speed and convenience. PIN-And when you use a fingerprint, you can access the system in a split second, and this is especially true in situations where you have to take your phone out of your pocket and instantly answer an important call or read a message.
What many Redmi and POCO owners don’t know, however, is that the standard scanner settings can be expanded to make a conventional sensor a powerful tool for controlling your gadget. Proper calibration and adding additional finger profiles not only improves security, but also automates routine activities. In this article, we’ll take a closer look at the process of activating the function, the finerities of sensitivity settings, and how to solve typical problems.
Where is the sensor and preparation for work
The first step before setting up is to determine the location of the fingerprint scanner on your device, as the algorithm of actions can vary slightly depending on the model. In budget and medium-sized series, such as the Redmi Note or Redmi, the sensor is most often built into a round or oval button on the back of the case, which also performs the screen lock function. Flagship models Xiaomi Mi and Xiaomi 13/14 often feature an ultrasonic or optical scanner built directly into the display.
It is important to make sure that the sensor surface and your finger are clean, as greasy spots or moisture can significantly reduce the readout accuracy.If you use a security glass, check its compatibility with underscreen scanners, as thick glass can block the signal.For side scanners, contamination of the button can also lead to sticking or malfunctioning of the mechanism.
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Rub the scanner area with a soft microfiber before setting up so that the system reads the sharpest possible pattern of papillary lines.
Before starting the procedure, make sure that the battery is at least 20-30% so that the device does not turn off during the process of making changes to the system security files. Although the risk of data loss is minimal, stable power ensures that all configuration steps are completed correctly.
Step-by-step activation of the scanner in MIUI and HyperOS
The process of enabling biometric protection in the MIUI shells and the new HyperOS is almost identical and takes no more than a couple of minutes. You need to open the main settings menu, scroll down to the Password and Security section and select Fingerprints. The system will request proof of identity, so you will have to enter the previously installed digital code or pattern lock once.
Once you enter the fingerprint control menu, click on the large Add fingerprint button to start the setup wizard. The screen will change, and animation will appear that requires repeatedly putting the selected finger on the scanner at different angles. Don't hold your finger statically; slowly change the angle of tilt, touching the sensor with the edge, then with the pad, then with the center.
☑️ Setup of biometrics
When the progress scale reaches 100%, the system will suggest giving a name to a new fingerprint, such as "Right big" or "Left index." This is especially useful if you plan to add a few fingers to understand in the future what profile is used to unlock or log in to applications.
Advanced Features: Fast Commands and Hidden Features
Many users stop at the basic setup, overlooking the unique capabilities of Xiaomi shell that turn the scanner into a universal controller. The fingerprint management menu, right below the list of added fingers, often contains the Additional Features or Quick Commands section, where you can assign the launch of specific applications or actions with a short or long press on the sensor.
For example, double tapping on the scanner can instantly start the camera, which allows you to not miss an important frame, even if the smartphone screen is turned off. Prolonged press (about 1-2 seconds) is often programmed to open the application management menu or start the voice recorder, which greatly speeds up access to frequently used tools.
Secret combinations for different models
It’s worth noting that the functionality of fast commands can vary depending on the version of the Android operating system and regional firmware. In global versions, the set of options is sometimes reduced compared to Chinese builds, but basic features like launching a camera are usually retained.
How to add a second finger to improve comfort
Using only one finger to unlock can be uncomfortable, especially if the phone is lying on the table or you are holding it in your left hand. Security and ergonomics experts recommend adding at least two fingers to your smartphone’s memory: your right thumb and your left thumb, which will allow you to use the device comfortably in any situation without putting it from hand to hand.
To add a second fingerprint, go back to the Fingerprint menu and click Add fingerprint again. The procedure is repeated similarly to the first time: the system will ask you to put a new finger until the scale is full. Remember to rename the profile so you don't get confused in the future, especially if you share the device with family members (although this reduces security).
In some cases, it makes sense to add the same finger twice under different names, such as "Finger Center" and "Finger Edge." This can help if the sensor does not read the edges of the fingerprint well and you want to increase the likelihood of successfully unlocking in different grip positions.
Table: Comparison of scanner types on Xiaomi devices
Understanding the type of sensor you have installed in your device helps you correctly assess its capabilities and limitations. Xiaomi’s lineup uses three main types of sensors, each with its own specifications and operating requirements.
| Type of sensor | Location. | Speed of operation | Features |
|---|---|---|---|
| Capacitive | Back panel / Side button | Instant. | Requires physical pressing, does not work with gloves |
| Optical (subscreen) | Built into the screen. | Tall. | Glows on scans, may be slower in the dark |
| Ultrasonic. | Built into the screen (flagships) | Very high. | Works with wet hands, safer but more expensive |
Capacitive scanners located on the back or side are considered the most reliable and fastest, as they are physically isolated from screen damage. Underscreen solutions look more aesthetic, but may require a more accurate hit with a finger, especially if the screen is pasted with cheap protective glass.
Elimination: if the imprint is not read
It is quite common for a previously running fingerprint scanner to stop responding or start producing errors. One of the main reasons is a software security service failure that can be corrected by restarting the device or cleaning the Settings app cache.
⚠️ Warning: If the scanner stops working after falling or getting moisture, do not try to dry it with a hair dryer or heat it. This can damage the plume or the sensor itself.
If software methods don't work, try removing all the saved prints and re-create them with a special focus on the edges of your finger, sometimes using the "Increase Recognition Area" function (if available in an engineering menu or special applications), but the standard means is to simply overload the biometrics data.
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Periodic removal and re-addition of a fingerprint helps to update the digital cast and improve the accuracy of recognition.
In rare cases, the problem may be due to a system update that contains bugs. Check the forums or official Xiaomi channels for reports of similar errors in your firmware version. If the problem is massive, wait for the patch or roll back to the previous version of the software.