In-Display Fingerprint Sensor Not Working
4.5
The optical or ultrasonic sensor under the screen fails to recognize your thumb.
Symptoms
- "No match"
- Sensor not lighting up
- Slow recognition
Possible Causes
- Thick screen protector
- Dry skin
- Software calibration
Step-by-Step Fix
1
Use Compatible Protector
Ensure your screen protector is certified for in-display sensors.
2
Moisturize Your Finger
Ultrasonic sensors struggle with very dry skin; a little moisture helps.
3
Re-register Fingerprint
Delete and re-add your thumb, pressing firmly during the scan.
When to See a Technician
Optical sensors (like on OnePlus) need a clean screen; Ultrasonic (like on Samsung) need a tight bond with the protector.
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