Biometrics make unlocking your Galaxy S25 Ultra fast and secure. Whether you use the fingerprint scanner or facial recognition, they save you from typing your password every time. But when these features stop working, it can be frustrating.
If your fingerprint sensor fails to recognize your finger or face unlock suddenly stops responding, the issue is usually caused by software glitches, dirt on the sensor, or incorrect settings. Here’s how to fix it.
Why Your Galaxy S25 Ultra Biometrics Might Not Be Working
- Fingerprint or face data is corrupted.
- Sensor or front camera is dirty.
- Screen protector interferes with fingerprint detection.
- Software bugs or outdated firmware.
- Battery saving features are restricting biometric performance.
Clean the Sensor or Camera Area.
Your biometrics rely on accurate data capture. Dirt, smudges, or screen protectors can interfere with both the fingerprint sensor and face unlock camera.
- Use a soft, lint-free cloth to gently wipe the display and front camera area.
- If you use a screen protector, remove it temporarily to see if the issue improves.
Keeping these areas clean helps the sensors read your inputs more accurately.
Re-register Your Fingerprints or Face Data.
Corrupted or incomplete biometric data often causes recognition issues. Deleting old entries and registering new ones gives the system fresh and accurate data.
- Open Settings, and then tap Security and privacy.
- Tap Biometrics, then choose Fingerprints or Face recognition, and remove all saved entries.
After removing them, register your fingerprints or face again following the on-screen prompts.
Turn Off Battery Optimization for Biometrics.
Battery-saving features can limit background processes that support biometrics. Disabling these ensures your fingerprint and face unlock work smoothly.
- Open Settings, and then tap Battery.
- Tap Background usage limits, and then make sure Biometrics services are not restricted.
Once done, restart your device and try unlocking it again.
Update the Software.
Outdated system versions can contain bugs that affect biometric performance. Keeping your Galaxy S25 Ultra up to date ensures better stability and compatibility.
- Open Settings, and then tap Software update.
- Tap Download and install, and wait for any available updates to complete.
After the update, check if the fingerprint or face unlock feature starts working properly.
Reset All Settings.
If none of the fixes work, resetting all settings can help eliminate configuration errors without deleting personal files.
- Open Settings, and then tap General management.
- Tap Reset, and then tap Reset all settings.
This restores all preferences, including those that might be interfering with biometric services.
Biometrics make your phone faster and more secure. Once these steps are done, your Galaxy S25 Ultra should recognize your fingerprints and face again without trouble.
FAQs
Why is my fingerprint sensor not responding at all?
This can happen due to a dirty screen, moisture, or a thick screen protector. Cleaning the area and re-registering your fingerprint usually helps.
Why does face unlock fail in low light?
Face recognition uses the front camera, which needs adequate lighting. In darker environments, try using the screen’s brightness assist feature under Face recognition settings.
Will resetting all settings delete my biometric data?
Yes. You will need to re-register your fingerprints and face after the reset. However, your personal files and apps remain untouched.
