The fingerprint scanner has become an integral part of modern Xiaomi smartphones, combining convenience and high security. However, many users face difficulties when first setting up or after resetting the phone to factory parameters. In this article, we will discuss not only the basic steps to activate unlock, but also the nuances of working with different types of sensors (optical, ultrasonic, capacitive), as well as common errors that interfere with the correct operation of the function.
We will focus on models with a scanner under the screen (for example, Xiaomi 13 Pro or Redmi K60), where the configuration algorithm may differ from the classic solutions. If you just purchased a device or updated the firmware MIUI, this instruction will help to avoid typical problems - from the "invisibility" of the sensor in the settings to slow fingerprint recognition.
Before you start, make sure your smartphone supports fingerprint unlocking. The full list of compatible Xiaomi, Redmi and POCO models is provided at the end of the article.
1. Preparing the smartphone for setting up the fingerprint
Before you add a fingerprint, you have to meet a few prerequisites, PIN-It's a security requirement, a code or a pattern lock. MIUI: The fingerprint scanner cannot be the primary (and only) method of unlocking. If you haven't set up an alternative method of protection, the system will suggest doing so at the step of adding the fingerprint.
Second, check the cleanness of the sensor. Physical scanners (like the Redmi Note 10's back) often accumulate fat or dust, which impairs recognition. For optical scanners under the screen (Xiaomi 12T, POCO F5), it is critical that there are no scratches on the protective glass in the sensor area. Use a soft limpless wipe and alcohol for cleaning - but avoid aggressive detergents.
Also make sure that the device has the current version of MIUI installed. Old firmware (below MIUI 12) may not have options to configure the scanner under the screen. Update the software via Settings → About Phone → System Update.
Whether identified PIN-code
Clean sensor (no dust, grease, scratches)
Up-to-date version of MIUI (not lower than 12th)
Lack of protective film in the scanner area (for optical sensors)-->
2. Step-by-step instructions: how to add a fingerprint
The process of adding a fingerprint is the same for most Xiaomi models, but may vary slightly depending on the version of MIUI.
- Open Settings and go to Passwords and Security.
- Select Fingerprint Addition (or Fingerprint in older versions).
- Enter the current one. PIN-proof-code.
- Follow the hints on the screen: Put your finger on the sensor and raise it when there is a vibration or backlight. Repeat the process 10-15 times until the scanner has captured all the areas of the fingerprint.
- Name the print (for example, "Indicative right") and save.
For optical scanners under the screen (Xiaomi 13, Redmi K50) it is important to:
- 👆 Put your finger strictly in the center of the sensor area (usually indicated by animation).
- 💡 Don’t press too hard – a light touch is enough.
- 🔄 If the scanner doesn’t respond, try restarting the phone and repeating the process.
Tip: Add multiple fingerprints of one finger at different angles, which will increase recognition speed, especially if you often pick up your phone with wet or dirty hands.
Physical button (on the back or side)
Optical underscreen
Ultrasonic underscreen
I don't know/no scanner.-->
3. Configure additional parameters of the fingerprint
Once you add a fingerprint, you can customize your fingerprint behavior in the system. Go back to Settings → Passwords & Security → Fingerprint and explore the options available:
| Parameter | Description | Recommendation |
|---|---|---|
| Screen unlocking | Allows the use of a fingerprint to unlock the device. | ✅ Turn it on. |
| Quick unlock. | Disables recognition animation (accelerates unlocking). | ⚠️ Turn on if the sensor is stable |
| Payment and confirmation | Use a fingerprint to confirm payments in Mi Pay, Google Pay. | ✅ Enable (requires additional settings in applications) |
| Accessible applications | Select applications that can request a fingerprint (e.g. banking). | 🔧 Manually configure for critical applications |
Important: If you turn on the “Quick Unlock” option, but the sensor will work with a delay, turn it off – this is a sign of incorrect calibration of the fingerprint.
For models with an ultrasonic scanner (Xiaomi Mix 4), the option Enhanced Recognition is available, which increases accuracy through additional checks, but can slow down the process slightly, and we recommend turning it on if you use your phone in high humidity conditions (for example, after showering or exercising).
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If the fingerprint is not recognized the first time, try adding it again, moving your finger slightly left/right with each touch, which will help the scanner to capture more unique points.
4. Problem Solving: The scanner is not working or visible in the settings
If you don’t find the fingerprint partition in the settings or the sensor doesn’t respond to touch, the reasons may be as follows:
⚠️ Attention: on some models POCO (for example, POCO M3) The fingerprint scanner is disabled in regional firmware, and you need to reflash the device to the global or European version to activate it. MIUI.
- 🔧 Sensor not detected in settings: Check if your model supports scanner (list below). MIUI Reset your settings through Settings. → System system → Resetting settings → Reset all settings (does not delete data).
- 👆 Scanner doesn't recognize fingerprint: Remove the old print and add it again. Check the sensor for physical damage. Turn off the "Quick Unlock" option in the fingerprint settings.
- ⚡ Sensor is running with a delay: Clear the system cache through Settings → Memory. → Clean. Calibrate the print by adding it at different angles. Check if the phone overheats (the sensor may turn off when it overheats).
Under-screen optical scanners (Xiaomi 12, Redmi K40) have a problem with bright sunlight recognition, due to the sensor’s specific features, such as using a fingerprint in the shadows or adding an alternative method of unlocking (such as facial recognition).
What if the scanner stopped working after the MIUI update?
5. Optimization of the scanner: tips for different scenarios
The speed and accuracy of fingerprint recognition depends not only on the specifications of the sensor, but also on how you use it. Here are some practical recommendations for different situations:
For wet or dirty hands:
- 💦 Add a print with a slightly wet finger (after washing your hands).
- 🧴 Use a hand cream without silicones – it improves grip on the sensor.
- 🧽 Wash the sensor with an alcohol wipe 1-2 times a week.
For cold weather (winter):
At low temperatures, the skin becomes drier, which can impair recognition.
- ❄️ Before unlocking, rub your fingers against each other.
- 🧤 Use thin touch gloves with your finger open for the sensor.
- 🔋 Keep your phone in your pocket closer to your body – this will prevent the sensor from becoming overcooled.
To protect confidentiality:
If you’re afraid someone might unlock your phone while you sleep (for example, by putting your finger on a sensor), follow these steps:
- Turn off the option Unlock when the screen is off in the fingerprint settings.
- Add an additional fingerprint with an error (for example, slightly shifted). If forced to unlock, this will cause a delay.
- Configure Smart Lock in Google Settings → Security to ensure that the print only works in safe places (home, work).
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Adding a fingerprint from different angles and under different conditions (wet/dry fingers) greatly improves the reliability of recognition in real-world scenarios.
6. Comparison of scanner types: which is better?
Xiaomi smartphones come with three types of fingerprint sensors: capacitive (physical button), optical (under screen) and ultrasonic (under screen).
| Type of sensor | Advantages | Deficiencies | Examples of models |
|---|---|---|---|
| Capacitive (button) | ✅ Quick recognition.✅ It doesn't depend on the lighting.✅ Cheaper in manufacturing | ❌ Takes up space on the hull.❌ Sensitive to scratches | Redmi Note 11, POCO X3 |
| Optical (under the screen) | ✅ Contemporary design✅ He works with wet fingers.✅ Large area of scanning | ❌ Slower than capacitive❌ It works badly in the bright sun.❌ Highly expensive in repairs | Xiaomi 13, Redmi K50 |
| Ultrasonic (under the screen) | ✅ The most accurate✅ He works with dirty fingers.✅ 3D-scan | ❌ Dearest.❌ Sensitive to protective glass | Xiaomi Mix 4, Black Shark 5 |
If you’re choosing a smartphone and you’re looking for a speed-critical unlock, look for models with a capacitive sensor (like the POCO F4). For the premium segment, ultrasonic scanners (Xiaomi 14) are the priority, but be prepared for a higher repair price if damaged.
7. Xiaomi models with fingerprint unlock support
Not all Xiaomi smartphones have a fingerprint scanner, and here is a current list of models (2026) that support this feature.If your model isn’t on the list, it probably only uses face unlock or face unlock. PIN-code.
Flagship models (premium segment):
- Xiaomi 14/14 Pro/14 Ultra is an ultrasonic scanner under the screen.
- Xiaomi 13 / 13 Pro / 13 Lite is an optical scanner under the screen.
- Xiaomi Mix 4 / Mix Fold 2 is an ultrasonic scanner.
- Black Shark 5/5 Pro – a capacitive sensor (button).
Mid-segment (Redmi/POCO):
- Redmi K60 / K60 Pro / K60E is an optical scanner under the screen.
- Redmi Note 12 Pro+/Note 12 Turbo is an optical scanner.
- POCO F5/F5 Pro is an optical scanner.
- POCO X5 Pro – capacitive sensor (button).
- Redmi Note 11 / 11 Pro – capacitive sensor (button).
Budget models:
- Redmi 12 / 12C - capacitive sensor (rear panel).
- POCO M5/M5s – capacitive sensor (button)
- Redmi A2/A2+ – No fingerprint scanner
Please note that in some regions (for example, for the Indian market), Xiaomi can release modifications of devices without a scanner.