If Face Unlock is not working on your Xiaomi 15 Ultra, unlocking your phone can feel slower and inconvenient. Sometimes it stops recognizing your face, fails in certain lighting, or does nothing at all when you lift the phone. Most of the time, this issue is caused by simple settings, lighting conditions, or temporary system glitches that you can fix in just a few minutes.
Why Face Unlock Is Not Working on Your Xiaomi 15 Ultra
- Face Unlock is turned off or not fully set up.
- Poor lighting or a dirty front camera is blocking face recognition.
- Power saving features are limiting biometric functions.
- Software bugs or background glitches are affecting the system.
- Your face appearance has changed enough to confuse Face Unlock.
Check If Face Unlock Is Enabled
Face Unlock will not work if it was accidentally disabled or not completed during setup. Verifying this ensures the feature is active and ready to scan your face.
Open Settings, and then tap Passwords and security.
Tap Face unlock, and then make sure the toggle is turned on.
If prompted, unlock the phone using your PIN, pattern, or password.
Clean the Front Camera and Improve Lighting
Face Unlock relies heavily on the front camera and ambient light. Dirt, smudges, or low lighting can prevent your face from being recognized properly.
Wipe the front camera gently using a clean, dry cloth.
Move to a well lit area, and then try unlocking the phone again.
Avoid strong backlight, such as bright windows behind you.
Turn Off Battery Saver or Performance Limits
Battery saving features can restrict biometric services to extend battery life. Disabling them allows Face Unlock to work normally in the background.
Open Settings, and then tap Battery.
Tap Battery saver, and then turn it off.
Lock the screen and test Face Unlock again.
Re Register Your Face Data
If Face Unlock frequently fails or stops recognizing you, the saved face data may be inaccurate. Re registering your face helps the system learn your current appearance.
Open Settings, and then tap Passwords and security.
Tap Face unlock, and then choose Delete face data.
Set up Face Unlock again by following the on screen instructions.
Restart Your Xiaomi 15 Ultra
Temporary software glitches can interrupt biometric features. Restarting refreshes system services and often restores Face Unlock instantly.
Press and hold the Power key until the power menu appears.
Tap Restart, and then wait for the phone to boot up fully.
Try unlocking the phone once it is back on.
Check for Software Updates
Face Unlock issues can sometimes be caused by bugs that Xiaomi fixes through updates. Installing the latest software ensures you have the most stable version.
Open Settings, and then tap About phone.
Tap MIUI version or Software update, and then check for updates.
Install any available update and restart the device if required.
Face Unlock on the Xiaomi 15 Ultra is designed to be fast and reliable, but it depends on proper setup and conditions. Once the settings are corrected and the system refreshed, the feature usually works smoothly again.
FAQs
Does Face Unlock work in the dark on the Xiaomi 15 Ultra?
Face Unlock works best in good lighting. In very dark environments, it may struggle because it relies on the front camera rather than advanced infrared sensors.
Can Face Unlock stop working after a software update?
Yes. Some updates can introduce temporary bugs or reset biometric services. Restarting the phone or re registering your face usually fixes the problem.
Is Face Unlock secure enough for daily use?
Face Unlock is convenient, but it is generally less secure than fingerprint or PIN protection. For better security, use it together with a strong lock screen method.
