How to add a fingerprint on Xiaomi Redmi 8 Pro: full instructions with tips for setting up

Xiaomi Redmi 8 Pro features a built-in fingerprint scanner that makes it much easier to unlock your device and protect sensitive data. However, many users face difficulties when first setting up biometric authentication: the sensor does not recognize a finger, the system emits errors, or the registration process is interrupted. In this article, we will discuss not only the standard procedure for adding a fingerprint, but also the hidden settings of MIUI that will help optimize the scanner, and consider typical errors and how to fix them.

It's important to understand that the quality of the sensor depends not only on the correctness of the registration, but also on the state of the finger itself, the purity of the sensor and even the firmware version. For example, after upgrading to MIUI 14, the recognition algorithms were reworked, which could affect sensitivity. If you have previously tried unsuccessfully to adjust the print, follow our instructions - it takes into account all the nuances, including the location of the sensor on the rear of the Redmi 8 Pro (unlike models with a side scanner).

Preparation of the device before adding a fingerprint

Before you start recording a fingerprint, you have to follow a few steps, and neglecting them can cause sensor malfunctions or low recognition accuracy.

• 🧼 Clean the sensor and finger. Wipe the sensor with a soft, lilaless wipe (a microfiber for glasses), and wash your finger with soap and dry. Fat marks or moisture distort the scan.
• 🔋 Charge the smartphone to at least 20%. the registration process requires active work of the processor, and at low charge the system can interrupt the settings.
• 📱 Update. MIUI You can have biometric bugs in old firmware. Check the updates in Settings. → The phone. → Updating the system.
• 🔒 Set a pattern lock or PIN-This is a prerequisite for activating the scanner, and without it, the option to add a fingerprint will be blocked.

Pay special attention to the state of the screen and the back. On the Redmi 8 Pro, the sensor is located under the camera, and it is easy to cover it with a cover or a sticker. Make sure that there is nothing preventing contact between the finger and the sensor. Also check if the power saving mode is on, it can limit the operation of the sensor.

Step-by-step: how to add a fingerprint

Now, let's get to the immediate settings, and follow the instructions carefully, because every step is important for the scanner to work properly.

1. Open Settings and go to Passwords and Security.
2. Select Fingerprint Addition. The system will request the current PIN-code-key.
3. Place your finger on the sensor (on the back of the camera) and wait for the vibration. Don't press too hard -- just a light touch is enough.
4. Follow the hints on the screen: the system will ask you to raise and put your finger again to grab different areas, and it is important to cover at least 70% of the surface of your finger for reliable recognition.
5. After a successful scan, assign a name (e.g., “Indicative Right”) to the fingerprint and save it.

The registration process takes about 30 seconds. If at some point you get a "failed to add a fingerprint" error, try again by slightly changing the angle of your finger, sometimes helping to turn the smartphone in your hand so that your finger falls down more naturally.

Remove the case or sticker from the sensor |

Rub your finger and sensor |

Turn off the power saving mode |

Make sure there are no cuts or calluses on your finger-->

Optimization of the scanner: hidden settings MIUI

Even after successful fingerprint registration, some users complain of slow recognition or false positives, and MIUI has hidden parameters that will help improve the sensor's performance:

• 🔍 Sensitivity enhancement. Activate Settings mode. → Special facilities → Improved fingerprint recognition: This option increases scan time but reduces errors.
• 🔄 Recalibrate the sensor. If the scanner is unstable, reset it: delete all the fingerprints, restart the phone and add them again.
• 🛡️ Limitation of background processes. C Settings → Battery → Select Balanced Performance Mode – This will prevent the sensor from shutting down due to optimizing power consumption.

For models with MIUI 12 and above, the Quick Unlock feature is available, which reduces the latency in recognition.

Settings → Lock screen → Additional settings → Quick unlock with a fingerprint

Note that if you are using non-original firmware (like LineageOS or Pixel Experience), some biometric features may not work properly, in which case it is recommended to return to the official MIUI or install the Magisk module to correct sensor errors.

Typical errors and their solutions

Even with the right setup, Redmi 8 Pro users may encounter problems, and consider the most common bugs and how to fix them:

If none of these methods worked, try resetting your security settings: Settings → Passwords & Security → Resetting your security settings. This will remove all fingerprints and passwords, but can resolve software conflicts. Be sure to remember or save your current passwords before resetting!

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If you wear gloves often or have dry skin, slightly moisten your finger before the scan (not with wet water, but with a special cream) to improve contact with the sensor.

How to remove or change saved prints

Over time, you may need to update your registered fingerprints (for example, if your finger is injured or has corns on it).

1. Go to Settings → Passwords and Security → Fingerprints.
2. Enter. PIN-code or pattern lock for confirmation.
3. Click on the print you want to delete or change.
4. To delete, select Remove, to change – Rewrite and go through the registration procedure again.

If you want to reset all fingerprints completely, do so through Security Reset (as mentioned earlier).Be aware that all saved passwords from Wi-Fi and applications will be deleted along with the fingerprints.

With the Redmi 8 Pro, you can register up to 5 fingerprints, which is convenient if you want to use different fingers to unlock depending on the situation (for example, the thumb of the right hand for everyday use, and the index left for payments).

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Register the fingerprint at the angle you normally hold your phone at. If you unlock your smartphone more often on your desk, add the fingerprint in that position.

Security: How to protect data when using a fingerprint

Biometric authentication is convenient, but not without risks, and here are some tips to make it more secure:

• 🔐 Always use a backup. PIN-The print can be forged (e.g., by a high-quality cast) and PIN You're the only one known to you.
• 🚫 Don't register the fingerprints of strangers, even if you trust the person, their biometrics can be used without your knowledge.
• 🔄 Re-register your fingerprints every 6 months to reduce the risk of failure due to skin changes.
• 📱 Turn off fingerprint unlock for sensitive applications. In the settings of banking programs (for example, SberBank Online or Tinkoff), it is better to leave only PIN.

V MIUI There is a “Block After Reboot” function that requires input PIN-It's the code that you first turn on your phone after you turn it off, and it protects the data if someone gets physical access to the device that's off, so you can activate it:

Settings → Lock screen → Additional settings → Blocking after rebooting

Also, look at the Smart Lock settings in Google → Security Settings. Here you can set up automatic unlock in trusted places (such as at home), but this reduces the overall level of protection.

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If you sell or transfer a phone, remember to delete all fingerprints and reset security settings. Even after resetting to factory settings, some biometric data may be stored.

Frequent questions and answers