Fingerprint settings on Xiaomi Redmi Note 7: a complete guide with expert tips

Why the Redmi Note 7 fingerprint scanner is unstable and how to fix it

The fingerprint scanner on Xiaomi Redmi Note 7 is one of the key security elements that can eventually start to fail. Users often face problems: the sensor does not recognize the fingerprint the first time, the system asks you to enter the fingerprint. PIN-It's not like you're unlocking it, or it's not responding at all, and it's because of the software settings, but also because of the physical state of the sensor.

In this article, we'll look at not only the basic fingerprint settings, but also how to optimize scanner performance, fault diagnosis, and little-known MIUI features to help avoid errors. For example, did you know that Redmi Note 7 can set up finger unlock for different applications? Or that the sensor requires periodic "recalibration"?

Preparing the smartphone before setting up the fingerprint

Before you add a print, make sure your Redmi Note 7 is ready for the procedure.

• 🔋 The battery must be at least 20% charged, and at low charge, the system can interrupt the process of adding a fingerprint.
• 🧹 Sensor cleanliness: wipe the scanner with a dry microfiber wipe. Fat marks or dust interfere with the correct reading.
• 🔐 Installed PIN-It's a code or a pattern lock, and without it, you can't add a print, because it's a security requirement. MIUI.
• 📱 Updated firmware. MIUI Below 12.0, there may be scan errors.

If you've recently updated your firmware or reset your settings, the sensor may need to be recalibrated.

1. Go to Settings → About Phone → MIUI version.
2. Click on the MIUI logo 7 times in a row to activate the developer mode.
3. Return to Settings → Additional → For developers and enable the option to debug over USB.
4. Connect your phone to your PC and type in the command: adb shell cmd fingerprintd calibrate

⚠️ Warning: After calibrating the sensor, all the stored prints will be deleted. Back them up in advance via Settings → Passwords and security → Fingerprints (export to the MI-account).

Step-by-step: how to add a fingerprint

The process of adding a fingerprint to the Redmi Note 7 is intuitive, but there are nuances that affect the recognition quality.

1. Open the settings: go to Settings → Passwords and Security → Fingerprints.
2. Enter. PIN-proof-of-identity.
3. Click "Add fingerprint" and select your finger (e.g., "Right hand index").
4. Put your finger on the sensor (located on the back of the camera), and the system will ask you to raise and lower your finger to capture different areas.
5. Wait for 100% full. Don't interrupt the process, it can lead to incomplete scans.
6. Save the print and test the unlock.

A critical mistake most users make is that they only add a print from one angle (for example, strictly vertically), so that the scanner works from any angle, when recording a fingerprint, turn your finger 15-20 degrees left / right.

Put your finger on a clean and dry hand.|

Grab the edges of the finger pad |

Repeat the scan 3-4 times for one finger|

Don’t push too hard – the sensor is sensitive to pressure-->

Optimizing the scanner: secret MIUI functions

MIUI offers some hidden possibilities for improving the fingerprint sensor.

If the scanner gets worse after the MIUI update, try resetting it:

1. Delete all the fingerprints you saved.
2. Reboot the phone.
3. Add the prints again, following the instructions above.

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To test the sensitivity of the sensor, use the test mode. Type ##6484## in the dialer and select Manual Test → Fingerprint Test. The system will show how well the scanner recognizes touch.

Typical errors and their solutions

Even if you set up the fingerprint scanner on the Redmi Note 7 correctly, it can still give you errors.

• 🚫 "Print not recognized": "Cause: dirty sensor, wet fingers or incomplete scan.Solution: wipe the sensor with an alcohol wipe, overwrite the print, grabbing the edges of the finger.
• ⚡ "Scanner fails": "Cause: software failure or sensor plume damage. Solution: restart your phone. If it doesn't, check the sensor at the service center (on Redmi Note 7, this is a common problem after falls).
• 🔄 "Begs. PIN after the reboot": Reason: Android security requirement - after the reboot, you need primary authentication. PIN The scanner will work as usual.

⚠️ Note: If after the update MIUI The scanner stopped working at all, check if it's disabled in the developer settings. → Additionally. → For developers and make sure that the option to turn off fingerprints is turned off.

Security: How to protect data when using a fingerprint

A fingerprint is a convenient, but not the most reliable way to protect yourself.

• 🔒 Use the complex PIN (at least 6 digits) as a backup unlock method. Avoid birth dates or repeating digits.
• 🚷 Turn off fingerprint unlock for payments if you use mobile banking. MIUI This is set up in Settings. → Annexes → Permit management → Payments.
• 🔄 Regularly update your fingerprints (every 3-6 months) and the skin on your fingers changes over time (cuts, calluses), which can impair recognition.
• 📱 Activate "Invisible Mode" in Settings → Lock screen → It hides notifications on a locked screen.

Important: Your fingerprint cannot be changed, unlike your password. If your phone is stolen, an attacker can force it to unlock with your finger (e.g. while sleeping). To avoid this, set up automatic lock after 5 minutes of inactivity in Settings → Lock screen → Autolock.

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Never add other people’s fingerprints to your phone – this violates MIUI’s security policy and may result in a Xiaomi account being blocked.

Redmi Note 7 scanner compared to other Xiaomi models

The fingerprint sensor on the Redmi Note 7 uses Goodix technology, which is inferior in speed and accuracy to the flagship solutions from Qualcomm (for example, in the Xiaomi Mi 9). 8A, where false positives are often encountered.

If you’re planning to upgrade from the Redmi Note 7 to a newer model, look for scanners with ultrasonic technology (like the Xiaomi 12 Series) that work even with wet or dirty fingers and are less prone to wear and tear.

FAQ: Answers to Frequent Questions