Fingerprint lock is a fast and secure way to unlock your Samsung Galaxy phone and access apps or features. Whether your device has an in-display sensor (ultrasonic or optical), a side-mounted scanner, or a rear-mounted one, setup is easy.
Step 1: Set Up a Backup Lock (Required)
- Open Settings > Security and privacy (or Biometrics and security on older versions).
- Tap Screen lock type.
- Choose a PIN, pattern, or password.
Step 2: Add a Fingerprint
- Go to Settings > Security and privacy > Biometrics > Fingerprints.
- Enter your PIN/pattern/password.
- Tap Add fingerprint.
- Follow on-screen prompts to scan your finger:
- In-display sensor: Touch the center of the screen.
- Side sensor: Touch the power button.
- Rear sensor: Use the sensor on the back.
- Lift and reposition your finger until it reaches 100%.
- Tap Done.
Step 3: Add More Fingerprints (Optional)
- Go back to Settings > Fingerprints.
- Tap Add fingerprint.
- Scan another finger.
- Tap Done. You can rename each for easier management.
Step 4: Manage Fingerprint Settings
- Fingerprint unlock: Enable to unlock phone with fingerprint.
- Fingerprint always on: Optional for side sensors (unlock without pressing).
- Show icon when screen is off: Optional for in-display sensors.
- Use fingerprint for:
- Samsung Pass (autofill passwords)
- Samsung Pay/Wallet (mobile payments)
- Secure Folder (encrypted private space)
Step 5: Delete a Fingerprint
- In Settings > Fingerprints, enter your lock method.
- Tap a fingerprint > Remove > Confirm.
Troubleshooting Fingerprint Issues
- Wipe sensor and finger: Clean both for better recognition.
- Re-register fingerprints: Scan different angles.
- Check screen protector: Especially for in-display sensors.
- Restart your phone: Can fix temporary glitches.
- Update software: Bug fixes and sensor improvements.
- Avoid extreme cold: May reduce fingerprint sensitivity.
FAQ
Q1: What’s the difference between ultrasonic and optical sensors?
- Ultrasonic: 3D scan using sound (works with wet fingers).
- Optical: 2D scan using light (requires clean, dry screen).
Q2: How many fingerprints can I save?
- Usually up to 4 or 5.
Q3: Why does it ask for PIN sometimes?
- After restart, idle time, or failed attempts.
Q4: Can I use fingerprint for apps/payments?
- Yes, in Samsung Pay, Google Pay, Samsung Pass, and Secure Folder.
Q5: Fingerprint not working?
- Clean sensor, update software, re-register, check protector, or restart the device.
Fingerprint unlock is not just secure—it’s fast and efficient. With multiple fingerprints registered and thoughtful settings, you can unlock your phone and apps with just a touch.
