Fingerprint settings on Xiaomi: from adding to fixing bugs

The fingerprint scanner on Xiaomi smartphones is not just a convenient way to unlock, but also an additional layer of personal data protection. However, many users face difficulties when adding a fingerprint for the first time or after resetting. In this article, we will examine all the stages of settings, from checking the sensor’s performance to solving typical errors such as “Not able to add a fingerprint” or “Scanner does not respond”.

It is important to understand that the process can vary depending on the model: on the Redmi Note 12 Pro+ with a subscreen scanner, the algorithm for adding a different algorithm than on the Poco X3 Pro with a physical button. We will take these nuances into account and provide universal solutions relevant to MIUI 13/14/15 (including hyperos), you will also learn how to circumvent the restriction on the number of fingerprints (maximum 5 pieces) and why the system sometimes requires you to enter a pattern lock before adding a new fingerprint.

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

Not all Xiaomi smartphones have a fingerprint sensor. For example, the budget models of the Redmi A or Poco C series often do without it. To avoid wasting time, first make sure that your device supports this feature.

Check the presence of the scanner can be in two ways:

• 🔍 Visually, look for an oval recess (physical sensor) on the back or check the screen for backlight when touched (underscreen scanner). On models with a power button on the side edge (e.g. Redmi Note). 11S) sensor can be built into it.
• 📱 Through Settings: Go to Settings → Passwords and security → If you don't have a point, there's no scanner in the device.

⚠️ Note: On some models (e.g. Redmi Note 8 Pro), the fingerprint scanner may stop working after the update. MIUI In this case, only the firmware rollback or the service will help.

Preparing your smartphone before adding a fingerprint

Before starting the scan, several mandatory conditions must be met:

1. Set a pattern lock or PIN-The system requires a backup unlock method in case the scanner fails. If it does not, a notification will appear: "First set up screen lock».
2. Clean the sensor. Fat marks or dirt interfere with reading. Physical scanners use an alcohol napkin, underscreen - dry microfiber.
3. Make sure there is no film/glass. Security accessories can block the infrared sensor (relevant for underscreen scanners).

Also check if the power saving mode is activated: it can turn off the sensor to save charge. Path: Settings → Battery → Power saving mode.

PIN/pattern lock installed |

Sensor cleared of contamination |

There's no thick film on the screen.|

Power saving mode is off |

Fingers dry (moisture interferes with scanning)

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Step-by-step: how to add a fingerprint

The algorithm for adding is the same for most models, but there are nuances for underscreen and physical scanners.

1. Open Settings → Passwords and Security → Fingerprint.
2. Enter the current one. PIN-code or pattern lock for confirmation.
3. Click on “Add fingerprint” and select your finger (e.g., “Indicator right hand”).
4. Put your finger on the sensor and hold it until you feel the vibration or see the indicator filling up on the screen.
5. Raise your finger and repeat the action from different angles (the system will ask you to cover 100% of the print area).
6. After a successful scan, set up fingerprint actions: unlock, confirm payments, access to hidden folders.

For subscreen scanners (e.g., Xiaomi 12T):

• 👆 Put your finger strictly in the center of the screen, where the sensor light is located.
• 💡 Don’t press hard – a light touch is enough.
• 🔄 If the scan is suspended, restart the process, having previously restarted the smartphone.

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If you don't add a fingerprint the first time, try using a different finger, and some users have noted that the scanner is better at reading prints with a more pronounced pattern (for example, an index finger instead of a little finger).

Once added, check the scanner in real-world conditions: unlock your phone, confirm your purchase in Mi Pay, or open a secure folder. If the fingerprint doesn't work the first time, go to the "Problem Solutions" section.

Set up actions for fingerprinting

By default, the print is used only to unlock the screen, but in MIUI you can expand its functionality.

1. Go to Settings → Passwords and Security → Fingerprint → Fingerprint settings.
2. Activate options: 🔓 Unlocking the screen (on by default). 💳 Payment Confirmation (for Mi Pay, Google Pay). 🔐 Access to hidden albums (at Xiaomi Gallery). 📂 Application Protection (through Security) → Application protection).

For some activities (such as payments) you will need to re-enter PIN-code.

On models with HyperOS (for example, Xiaomi 14) there is a function “Fast Action”: you can assign a fingerprint to launch a specific application (for example, a camera) when holding your finger on the sensor.

⚠️ Note: If you use a fingerprint for payments, never add fingerprints of other people (even loved ones.

Problem Solving: The scanner is not working or doesn't add a fingerprint

If you add a fingerprint ("Not able to add a fingerprint", "Sensor does not respond"), try the following steps:

For a deep diagnosis:

1. Check the sensor in the engineering menu: ##4636## → Equipment Testing → Fingerprint If the test shows an error, the problem is hardware.
2. Reset the scanner settings: delete all prints and add again.
3. Update the firmware: go to Settings → About the phone → System update.

How to remove or change your fingerprint

Removal of a fingerprint may be necessary if it is no longer recognized or if you want to replace it with another fingerprint.

1. Open Settings → Passwords and Security → Fingerprint.
2. Enter. PIN-proof-code.
3. Click on the print you want to remove and select “Delete”.
4. Confirm the action.

To change a fingerprint (e.g., add another finger to the same place), first delete the old one, then add a new one. Note: the system allows you to store up to 5 fingerprints at a time. If the limit is exhausted, delete the unnecessary ones.

On some models (such as the Xiaomi Mi 11 Lite) after the fingerprint is removed, it may be necessary to reboot the changes to take effect.

Physical (on the back panel) |

Side (in the power button)|

Subscreen optical |

Underscreen ultrasound |

No scanner.

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Additional features: hidden scanner capabilities

In addition to the standard unlock, a fingerprint on Xiaomi can be used to:

• 📁 Hidden folders: in the file manager Mi File Explorer you can hide folders and open them only by fingerprint.
• 🔒 Application Protection: Through Security → Application protection assign a fingerprint to access banking applications or instant messengers.
• 🎮 Game mode: on some models (e.g. Poco) F4 GT) The print can be tied to the launch of the Game Turbo game space.
• 🔄 Quick Action: HyperOS has the ability to assign a fingerprint to run specific functions (for example, turning on a flashlight).

To activate hidden functions:

1. Enable Developer Mode: Settings → About Phone → MIUI Version (click 7 times).
2. Go back to Settings → More → For developers and find options related to Fingerprint.

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The fingerprint on Xiaomi can be used not only to unlock, but also to protect sensitive data (hidden folders, applications), as well as to quickly access frequently used functions.

FAQ: Answers to Frequent Questions