Face Unlock is one of the most convenient ways to access your Galaxy S25 Ultra. It saves you time, adds convenience, and works instantly in most conditions. But if it suddenly stops recognizing your face or fails to unlock your phone, something is likely interfering with the sensors or settings.
Here’s how to fix Face Unlock not working on your Galaxy S25 Ultra.
Why Face Unlock Might Not Be Working on Your Galaxy S25 Ultra
- Face recognition is turned off or not properly set up.
- The front camera lens is dirty or obstructed.
- Poor lighting or wearing glasses affects recognition.
- Software bugs or outdated system version.
- Power saving or screen timeout settings interfere with Face Unlock.
Clean the Front Camera Lens.
Face Unlock uses the front camera to identify your face. Dirt, fingerprints, or smudges can block the camera’s view and cause detection problems.
- Wipe the front camera gently using a soft, clean microfiber cloth.
- Restart your Galaxy S25 Ultra, and then try unlocking your device again.
Check and Re-Register Your Face Data.
If Face Unlock was set up under poor lighting or with an obstructed view, the data may be inaccurate. Re-registering your face ensures better accuracy.
- Open Settings, and then tap Security and privacy.
- Tap Biometrics, and then tap Face recognition. Enter your PIN or password to proceed.
Tap Remove face data, then register your face again by following the on-screen instructions. Make sure you are in a well-lit area and hold your phone at eye level.
Disable Power Saving Mode.
Power Saving Mode can restrict Face Unlock features to reduce battery usage. Turning it off restores normal operation.
- Open Settings, and then tap Battery.
- Tap Power saving, and then toggle the switch off.
Once disabled, lock your screen and test Face Unlock again.
Check Brightness and Lighting Conditions.
Poor lighting can prevent the camera from identifying your face properly. For best results, make sure you are in a bright environment.
If you frequently unlock your phone in dark conditions, enable Screen brightness for unlocking in Face recognition settings. This will momentarily brighten the screen so the camera can see your face clearly.
Clear Cache of Face Recognition.
Temporary app data may cause facial recognition to glitch. Clearing the cache gives the feature a fresh start.
- Open Settings, and then tap Apps.
- Tap the three-dot menu, and then tap Show system apps. Scroll down and tap Face Recognition, then tap Storage. Tap Clear cache.
Restart your device afterward and try unlocking again.
Update Your Phone’s Software.
Software updates often include bug fixes and performance improvements for biometrics. Keeping your Galaxy S25 Ultra up to date can prevent recurring Face Unlock errors.
- Open Settings, and then tap Software update.
- Tap Download and install, and then follow the prompts to update.
After updating, restart your phone and test the Face Unlock feature again.
Reset All Settings.
If none of the methods work, system conflicts might be affecting biometrics. Resetting all settings restores them to default without deleting your files.
- Open Settings, and then tap General management.
- Tap Reset, and then tap Reset all settings.
Once the reset is complete, reconfigure Face Unlock and test it again.
Face Unlock is designed to make your Galaxy S25 Ultra experience seamless. With these fixes, you can restore it to full functionality and enjoy fast, reliable unlocking once again.
FAQs
Why does Face Unlock fail when I’m wearing glasses or a mask?
The camera may not recognize covered or altered facial features. Re-register your face with and without glasses for better accuracy.
Is Face Unlock safe to use for sensitive apps or payments?
It is secure for general use, but for sensitive actions like payments, Samsung recommends using fingerprints or a PIN for stronger protection.
Can I use Face Unlock in the dark?
Yes. Enable the Screen brightness for unlocking feature so the display lights up your face in low-light conditions.
