The fingerprint scanner on Xiaomi smartphones is not just a convenient way to unlock, but also an additional layer of protection for your data. However, many users face problems when you first set up: the sensor does not respond, the system produces an error “Cannot add a fingerprint”, or the scanner works every time. In this article, we will analyze all possible scenarios, from basic configuration on new models (Xiaomi 14, Redmi Note 13 Pro+) to solving typical errors on devices with MIUI 14 and HyperOS.
It is important to understand that the process can vary depending on the type of scanner: optical (under screen), ultrasonic (on flagships) and physical (on the power button for budget models). We will discuss each option in detail, as well as how to circumvent the restriction on the number of fingerprints (maximum 5 pieces) and why sometimes the sensor stops working after updating the firmware.
Preparing the smartphone before setting up the fingerprint
Before you add a fingerprint, make sure your Xiaomi is ready for the process.Here are key points that are often overlooked:
- 🔋 The battery must be at least 20% charged, and at low charge, the system can interrupt the adjustment process.
- 📱 Software Updates: Check the relevance of firmware in Settings → The phone. → Update the system. MIUI 13 and older scanner is more stable.
- 🧴 Sensor cleanliness: wipe the scanner with a dry wipe. Fat marks or dirt interfere with reading.
- 🔒 Password/pattern lock: without them, you can't add a fingerprint. If you're not configured, the system will prompt you to create a fingerprint.
Pay special attention to the type of lock screen, if you have only installed PIN-4-digit code, the system may require you to change it to a more reliable (at least 6 characters) or add a pattern lock.
Step-by-step: how to add a fingerprint
The process of adding a fingerprint is the same for most models, but there are nuances depending on the version of MIUI or HyperOS.
- Open Settings → Passwords and Security → Fingerprint.
- Enter your current password or pattern lock to confirm.
- Click Add Fingerprint and follow the prompts on the screen.
- Place your finger on the scanner at different angles until the scale is 100% full.
- Name the print (for example, "Indicative right") and save.
On models with an optical scanner under the screen (Xiaomi 13T, Redmi K60), it is important not to press the screen too much - a light touch is enough. If the sensor does not respond, try to slightly wet your finger (but not wet!). For ultrasound scanners (Xiaomi Mix Fold 3), moisture is not critical, but they are sensitive to dry skin.
Make sure there are no cuts or calluses on your finger |
Try the other finger (sometimes the sensor can read dry skin poorly)|
Reboot the phone and reset the setting |
Check if there is a protective film on the scanner (relevant for new devices)-->
Common mistakes and their solutions
If you add a fingerprint, you see a message that says, "Can't add a fingerprint. Try again," the reasons may be:
| Mistake. | Possible cause | Decision |
|---|---|---|
| The scanner doesn't respond to the touch. | Sensor contamination or protective film | Wipe the scanner with an alcohol napkin. Take the film off for optical sensors. |
| The process is interrupted by 50-70% | Unstable firmware or shell conflict | Update the software or reset the scanner settings to Settings → Applications → Application Management → System → Biometrics. |
| The print is added but does not work. | Conflict with third-party launchers or themes | Return the standard launcher or turn off the energy saving mode for the system. |
| The “Too Many Trials” Mistake | The system blocked the sensor after 5 failed attempts | Wait 30 minutes or restart your phone. |
HyperOS devices (such as Xiaomi 14) may experience a bug when they disappear from the list after adding a fingerprint, and this is due to system optimization.
- Delete all the fingerprints you saved.
- Reboot the phone.
- Add the print again without interrupting the process.
Why does the scanner work worse in winter?
How to Remove or Rename an Imprint
You can manage the saved prints in the same menu you added them to, so you can remove the print.
- Go to Settings → Passwords and Security → Fingerprint.
- Enter the password for confirmation.
- Click on the desired print and select Remove.
To rename:
- Put a print on the list.
- Choose Rename and enter a new name (e.g., “Left thumb”).
⚠️ Note: If you delete all fingerprints, the system may require you to enter a password the next time you turn on your phone, even if you didn't need to.
Additional functions of the fingerprint scanner
On Xiaomi smartphones, you can use your fingerprint to unlock more than just the keys.
- 🔐 Safe folder: hide files in the gallery → Protected albums that are only accessible by fingerprint.
- 💳 Payment via Mi Pay: Confirm payments without entering a password (set up in the Mi Pay app).
- 🔄 Quick profile switching: Some models can assign different prints to work and personal profiles.
- 📱 Launching applications: through Settings → Additionally. → Gestures of the print (not available on all models).
Xiaomi has a feature called “Unlock When Connecting to a Trusted Device” with MIUI 14+, for example, if you have a Mi Band or Xiaomi Buds headphone on your phone, you may not need a fingerprint scanner. You can set up in Settings → Passwords and Security → Trusted Devices.
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If the fingerprint scanner stopped working after the phone fell, check the integrity of the sensor plume. On models with a physical button (for example, Redmi 9A), contact often leaves after the impact.
What to do if the scanner is physically broken
If the sensor doesn't respond to any manipulations (reset, reset), there may be hardware problems.
- 🔍 Visual inspection: on optical scanners (under the screen), check if there are cracks in the sensor area.
- 🛠️ Test in the service menu: type ##4636## and select Equipment Testing → Fingerprint. If the test fails, the sensor malfunctions.
- 📦 Check after update: sometimes firmware "downs" the scanner drivers. Try to roll back on the previous version MIUI.
The cost of replacing the scanner in the Xiaomi service center varies from 1,500 to 5 000 rubles depending on the model. On Redmi cheaper, on flagships (Xiaomi 13 Ultra) - more expensive. If the phone is warranty, repair will be free, but only if the breakdown is not the fault of the user (for example, after a fall).
⚠️ Warning: Don't try to disassemble the phone yourself to replace the scanner! on models with optical sensors under the screen (Xiaomi) 12T, Redmi K50) It requires special equipment to calibrate the new module, and if it's installed incorrectly, it'll cause the sensor to fail.
Comparison of scanners on different Xiaomi models
The fingerprint scanning technologies on Xiaomi devices are evolving, and here's how they differ:
| Type of scanner | Xiaomi models | Pluses | Cons |
|---|---|---|---|
| Physical (on the power button) | Redmi 9/10, Poco M3 | Reliable, does not depend on the state of the screen | Slower than optical, the button wears out |
| Optical (under the screen) | Xiaomi 11T, Redmi Note 12 Pro+ | Quick unlock, modern design | Sensitive to pollution, works worse in bright sun |
| Ultrasonic. | Xiaomi Mix Fold 2, Black Shark 5 | Works with wet fingers, high accuracy | Road in repair, found only on flagships |
Since MIUI 14, Xiaomi has improved its fingerprint recognition algorithms by reducing false positives, but on budget models (Redmi A2+), the scanner may be slower due to a weak processor.
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On HyperOS devices (e.g. Xiaomi 14), the fingerprint scanner is integrated with the Xiaomi Smart Hub system.This allows you to use biometrics for authorization in smart ecosystem devices (e.g. unlocking the Mi Smart Lock door lock).