If your vivo S50 suddenly stops recognizing your fingerprint or face, unlocking your phone becomes frustrating fast. Sometimes it fails to detect your fingerprint, other times face unlock refuses to scan properly. The good news is that most biometric problems are caused by minor settings issues or sensor interference, and you can fix them in just a few minutes.
Why Your vivo S50 Biometrics Are Not Working
- Your fingerprint sensor is dirty or covered.
- Face unlock cannot detect your face due to poor lighting.
- Saved biometric data is corrupted or outdated.
- A recent software update caused temporary glitches.
- Screen protectors interfering with the fingerprint sensor.
1. Clean the Fingerprint Sensor or Front Camera
Dust, oil, or moisture can block the sensor and prevent accurate detection. Even a thin layer of residue can cause repeated authentication failures.
Gently wipe the fingerprint sensor area with a clean, dry cloth.
Wipe the front camera area, and then try unlocking again.
2. Restart Your vivo S50
A restart refreshes the system services that control fingerprint and face recognition. This often fixes temporary biometric glitches.
Press and hold the Power button, and then tap Restart.
Wait for the device to fully reboot, and then test your fingerprint or face unlock.
3. Re-Register Your Fingerprint
If your fingerprint was recorded poorly, the phone may struggle to match it accurately. Re-registering creates a fresh scan with better coverage.
Open Settings, and then tap Security.
Tap Fingerprint, and then delete the existing fingerprint profile.
Tap Add fingerprint, and follow the on-screen instructions carefully.
4. Re-Set Up Face Unlock
Face unlock may fail if your appearance has changed or if lighting conditions are different from when you first registered it. Setting it up again improves recognition accuracy.
Open Settings, and then tap Security.
Tap Face unlock, and then remove the saved face data.
Tap Add face, and complete the setup in a well-lit area.
5. Check Screen Protector Compatibility
Some thick or non-compatible screen protectors reduce fingerprint sensitivity. This is especially common with in-display fingerprint sensors.
Open Settings, and then tap Display.
Tap Touch sensitivity, and enable it if available.
If the issue continues, temporarily remove the screen protector and test again.
6. Update the Software
Software bugs can interfere with biometric services. Keeping your device updated ensures stability and security improvements.
Open Settings, and then tap System update.
Tap Check for updates, and install any available update.
Biometric issues on the vivo S50 are usually easy to resolve once you clean the sensor, refresh the system, or re-register your fingerprint or face data. After completing these steps, your device should unlock smoothly and reliably again.
FAQs
Why does my vivo S50 fingerprint sensor say not recognized repeatedly?
This often happens when your finger is wet, dirty, or placed incorrectly. Re-registering your fingerprint and cleaning the sensor usually solves the problem.
Does resetting fingerprints delete my data?
No. Removing or re-registering fingerprints only deletes biometric profiles, not your personal files or apps.
Why does face unlock fail in the dark?
Face unlock relies on visible light to detect facial features. In low light, recognition accuracy drops significantly unless screen brightness helps illuminate your face.
