How to Fix Xiaomi Phone Fingerprint Sensor Not Working

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A fingerprint sensor that doesn't recognize your finger is one of the most common Xiaomi complaints. Here's how to resolve it quickly.

Fix 1: Re-Register Your Fingerprints

Go to Settings > Biometrics & Password > Fingerprint Unlock → delete existing fingerprints → add them again. When registering, include multiple angles of the same finger for better recognition.

Pro Tips for Better Fingerprint Registration:

• Scan the same finger 5–6 times covering center and edges
• Register both thumbs if you use both hands
• Register with slightly damp fingers if you live in a dry climate

Fix 2: Check Screen Protector Compatibility

This is the #1 cause for under-display fingerprint sensors (UDFPS). Incompatible screen protectors block the optical or ultrasonic sensor.

Use only screen protectors certified for UDFPS (listed as "fingerprint-compatible"). Xiaomi officially sells compatible ones for each model.

Fix 3: Clean the Sensor / Screen Area

For side-mounted fingerprint sensors: clean the sensor surface with a dry cloth. For under-display: clean the glass over the sensor area.

Fix 4: Enable "Boost Fingerprint Recognition" (Under-Display Models)

Settings → Display → Fingerprint Icon in Standby → ensure it's enabled. Also try Settings → Biometrics & Password > Fingerprint Unlock > Boost Recognition.

Fix 5: Restart the Phone

A simple restart can resolve temporary biometric service glitches.

Fix 6: Update HyperOS

Fingerprint firmware improvements are regularly included in updates. Check Settings > About Phone > System Update.

Fix 7: Factory Reset / Service Center

If none of the above works, the sensor hardware may be faulty. Visit a Xiaomi service center.