The fingerprint scanner on Xiaomi Redmi 8 Pro is not just a convenient way to unlock, but also an additional level of protection for your data. PIN-Biometric authentication eliminates the risk of password selection and speeds up access to the device, but many users face difficulties in the first setup: the system does not recognize the fingerprint, the sensor does not respond or the scanner is intermittent.
In this article, we will take a step-by-step guide to activating fingerprint unlock, look at common errors and solutions, and give recommendations for optimizing the scanner, and focus on the nuances associated with the Redmi 8 Pro model, such as why you sometimes need to reboot after adding a fingerprint or how to avoid crashes in high humidity.
Preparing the smartphone before setting up
Before you start scanning your fingerprint, make sure your Redmi 8 Pro is ready for the procedure, and the main requirement is that you have a basic unlock method (PIN, password or pattern lock) without it, the system will not allow you to add biometric data.
Also check:
- 🔋 Battery level is at least 20%, and at low charge, the system can interrupt the setup process.
- 📱 The cleanness of the fingerprint sensor. Dust, fat or moisture on the sensor leads to scan errors.
- 🔄 The relevance of firmware. MIUI Below 12.0, possible bugs with the scanner.
If you've recently updated your firmware, restart the device to avoid conflicts with sensor drivers. On the Redmi 8 Pro, the fingerprint scanner is integrated into the power button, so don't press it too hard when you set it up - just a light touch is enough.
Step-by-step: Adding a fingerprint
Go to Settings. → Passwords and security → Fingerprint. The system will request the current input. PIN-A code or password is a standard security measure. Once confirmed, click Add fingerprint.
Follow the algorithm further:
- Place your finger on the sensor and wait for the vibration. Don't tear your finger off until the indicator on the screen is 100% full.
- So, raise your finger and repeat the action by changing the angle of touch, and the system requires you to scan the edges and the center of the pad for reliable recognition.
- After a successful scan, assign a name (e.g., "Indicative Right") to the fingerprint and save it.
The optimal number of fingerprints is 2-3 pieces (for example, the index and thumb of the right hand), which will eliminate problems if one of the fingers is wet or damaged.
Remove the protective film from the sensor |Rub your finger with a dry wipe | Turn off the energy saving mode |Make sure there are no cuts on your finger-->
Typical errors and their solutions
If the scanner does not recognize the fingerprint or if it gives an error "Can't add a fingerprint", the reasons may be as follows:
| Problem. | Possible cause | Decision |
|---|---|---|
| Sensor's not responding. | Sensor contamination or software failure | Wipe the sensor with an alcohol napkin, reboot the phone |
| No prints are saved. | Insufficient data to recognize | Repeat the scan by changing the angle of your finger. |
| Unlocking works in a time | Conflict with the MIUI shell | Update the firmware or reset the scanner settings |
On the Redmi 8 Pro, there is a bug when, after adding a fingerprint, the phone stops responding to the touch of the sensor.
⚠️ Warning: Delete all the fingerprints you saved, restart the device and add them again. If the problem recurs, reset the settings to Settings. → System system → Resetting settings → Resetting fingerprint settings.
Additional security settings
After adding a fingerprint, it is recommended to set the unlock conditions:
- 🔒 Demand PIN When restarting – protection in case someone reboots your phone.
- 📱 Unlocking the Lock screen – Allows the use of a fingerprint for quick access.
- 🛡️ Hidden notifications – hides the contents of notifications before unlocking.
Also in Settings → Passwords and security can be activated in secure mode MIUI, This is a system that blocks access to the scanner after 5 failed attempts.
💡
If you wear gloves or exercise frequently, add a wet thumbprint to do this by wetting your finger slightly before the scan.
What to do if the scanner stops working
If the fingerprint sensor has stopped responding completely, follow the following steps:
- Remove all saved prints in the settings.
- Clear the Settings app cache through Settings → Apps → Application Management.
- Check the sensor for physical damage – cracks or dents on the power button.
- If nothing helps, reset to factory settings (don’t forget to back up!).
On the Redmi 8 Pro, there are cases where the scanner fails after the phone falls, and in this case, a diagnosis is required at the service center - the sensor plume may have gone.
How to check the operability of the sensor without adding a fingerprint?
Comparison with other Unblocking Methods
A fingerprint isn’t the only way to biometric authenticate on the Redmi 8 Pro. Let’s look at the pros and cons of each option:
| Method | Advantages | Deficiencies |
|---|---|---|
| Fingerprint. | Quick unlocking, high reliability | Does not work with wet/dirty fingers |
| Facial recognition | Comfortable in gloves or when busy hands | Less safe, only works in good lighting |
| PIN/password | Universality, it always works | Longer to enter, risk peeking |
For maximum security, combine your fingerprint with PIN-For example, set up fingerprint unlock for everyday use. PIN — To confirm payments or access critical applications.
FAQ: Frequent questions about fingerprint scanner
Can I add a child's fingerprint?
Why is the scanner slower after the MIUI update?
Can I use a scanner to log in to applications?
What if the phone doesn’t vibrate when the sensor is touched?
💡
On the Redmi 8 Pro, the fingerprint scanner is combined with a power button, so avoid pressing hard when setting up - this can lead to false positives or damage to the sensor.