How to set up a fingerprint on Xiaomi: instructions for all models

The fingerprint scanner on Xiaomi smartphones is not only a convenient way to unlock, but also an additional layer of personal data protection. However, many users face difficulties in the first setup: the system does not see the sensor, the fingerprint is not saved or the device requires you to enter a password after each reboot. In this article, we will discuss all the steps of adding a fingerprint, from checking hardware compatibility to solving typical errors.

It's important to understand that the process can vary depending on the smartphone model and firmware version. For example, flagships like the Xiaomi 14 Ultra or Redmi Note 13 Pro+ use an ultrasonic scanner under the screen, and budget models (like the Poco M6) use an optical sensor on the back, and we take these nuances into account and provide universal solutions relevant to MIUI 14/15 and the new HyperOS.

Compatibility Check: Is there a fingerprint scanner in your model?

Before you try to add a fingerprint, make sure your Xiaomi smartphone supports this feature at all. Some budget models (such as the Redmi A2 or Poco C50) lack the sensor due to the savings on components.

• 🔍 Visually, look at the body of the device. On the back of the camera, there may be a circular or oval recess with a metal ring. AMOLED-screens (e.g. Xiaomi) 13T) The scanner is built into the display and is not visible.
• 📱 Through Settings: Go to Settings → Passwords and security → Fingerprint. If the partition is missing or gray, there's no sensor.
• 🛠️ Through AIDA64: Install the app from Google Play and check the Sensors section. Fingerprint sensor confirms support.

If the scanner is available but the partition is inactive, the problem may be a damaged sensor (for example, after a fall) or no drivers after the firmware, in which case only the service center will help.

⚠️ Note: Some models (e.g. Xiaomi Mi) A3) The fingerprint scanner is disabled at the firmware level due to hardware constraints. ADB or modified firmware may result in loss of warranty.

Preparing your smartphone before adding a fingerprint

To successfully save a fingerprint, you need to follow a few preliminary steps, and neglecting them is the main cause of errors like "failure to add a fingerprint" or "sensor is not responding."

Install PIN-code|Clean the screen from the protective film|Remove moisture from the sensor (wipe with a dry wipe)|Update the firmware to the latest version|Remove the case if it closes the sensor-->

Pay special attention PIN-Without it, the system will not allow you to add a fingerprint, which is a security requirement of Android. If you use a pattern lock, its complexity must be at least average (4).+ Also check that there are no cracks or severe scratches in the scanner area (relevant for underscreen sensors).

On models with an optical scanner (such as the Redmi Note 12), bright sunlight can interfere with reading, settings are better done indoors. For ultrasonic sensors (such as the Xiaomi 13 Pro), this is not critical, but moisture or dirt on your finger will still lead to error.

Optical (back) |Ultrasonic (under screen) |I don't know |No scanner-->

Step-by-step: how to add a fingerprint

When the preparation is complete, we move on to the main process. The instructions are universal for all Xiaomi models, but we will specify the nuances for different versions of the firmware.

1. Open Settings and go to Passwords and Security (on HyperOS, the path may be called Security).
2. Select a fingerprint. → Add a fingerprint. The system will request the current input. PIN-code-key.
3. Place your finger on the sensor and wait for a vibration or audible signal. Do not remove your finger until the system asks you to lift it (usually after 3-5 readings).
4. Repeat the process for different parts of your finger (edge, center, pad) to improve recognition accuracy, and the screen will display progress.
5. After reaching 100%, assign a name to the fingerprint (for example, "Indicative Right") and click Ready.

On models with a subscreen scanner (for example, Xiaomi 14), when you add a fingerprint, the screen will highlight the sensor area. If the backlight does not appear, check the brightness settings - it should be above 30%. Old firmware (MIUI 12 and below) may need to reboot after adding the first print.

Configure additional parameters of the scanner

Once you add a fingerprint, you can customize its behavior, such as allowing it to unlock only after you press the power button, or using a scanner to log in to apps.

HyperOS has introduced Smart Unlock, which allows you to automatically unlock your phone in trusted places (such as at home or work) without a scanner, but for security, we recommend leaving a fingerprint on the main authentication method.

⚠️ Note: If you have enabled the option to delete data after 10 failed attempts in the security settings, an attacker can erase all data on the phone by repeatedly trying to unlock it with the wrong fingerprint.

Solving common problems with the scanner

Even after you set it up properly, users will encounter errors, and let's look at typical scenarios and how to fix them.

• 🔄 "Fingerprints are not recognized after the update": Reset all saved prints and add them again. MIUI Sometimes reset the sensor calibration.
• 💧 "The scanner doesn't work in the rain or with wet hands": "This is normal for optical sensors.
• 🔋 "Demands. PIN After the reboot: This is how Android protection works. After completely switching off / on, the first block should be done PIN-code.
• 🛠️ "Sensor stopped working after fall": "Probably damaged plume link between sensor and motherboard.

If the scanner stopped working after installing custom firmware (for example, LineageOS), the problem is that there are no drivers. Try flashing the original Recovery through Fastboot:

fastboot flash recovery recovery.img


fastboot reboot recovery

On models with a subscreen scanner (for example, Xiaomi 12S), after replacing the display, the sensor may stop working even with the original module. This is due to the binding of the sensor to the motherboard at the hardware level - you will need to flash EEPROM in the service.

How to protect data if the scanner is compromised

A fingerprint is a biometric data that cannot be changed, unlike a password. If you suspect someone copied your fingerprint (for example, through a cast from a surface), immediately remove it from the system and add a new backup unlock method.

Xiaomi's security settings include the option "Delete all fingerprints when resetting." This should be enabled if you plan to sell or transfer your phone.

• 🔐 Use the hard stuff. PIN-code (at least 6 digits) as a backup method.
• 📱 Insert "Once removed lock" SIM-maps in the security settings.
• 🛡️ Activate Device Search via Mi Account for Remote Lock.

HyperOS has a Private Mode feature that allows you to hide notifications and apps when you unlock your fingerprint, which is useful if you give your phone to your colleagues or children but don't want them to see personal information.

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If you are often in cold rooms, add a fingerprint in a cold state, so the scanner will better recognize it at low temperatures.

Comparison of fingerprint scanners in different Xiaomi models

The fingerprint recognition technology in Xiaomi smartphones is evolving. 4X (2017) used a slow optical sensor, the Xiaomi 14 installed ultrasonic scanner of the third generation with support 3D-Recognition: Here is a comparison of key characteristics:

Ultrasonic scanners (such as the Xiaomi 14 Pro) are not only faster, but also safer, creating a three-dimensional fingerprint map that is harder to fake, but they are more expensive to repair: it costs 3,000 to 5,000 rubles to replace, compared to 1,000 to 2,000 for an optical scanner.

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If you want to unlock speed and work with wet hands, choose models with ultrasonic scanner (Xiaomi 12/13/14). For budget decisions, an optical sensor will suit, but be prepared for functional limitations.

Frequently asked questions