How to enable biometric login on MetaMask Mobile? (Security Settings)

Accessing Security Settings in MetaMask Mobile

1. Open the MetaMask Mobile application on your iOS or Android device.

2. Tap the circular profile icon located in the top-right corner of the home screen.

3. Select Security & Privacy from the dropdown menu.

4. Enter your wallet password to authenticate and proceed into the security configuration interface.

5. Scroll down to locate the Biometric Login toggle under the Authentication section.

Enabling Biometric Authentication

1. Ensure your device has biometric capabilities enabled at the system level—Face ID, Touch ID, or Android Biometric Prompt must be configured in device settings.

2. In MetaMask’s Security & Privacy screen, tap the Biometric Login switch to turn it on.

3. Confirm the action by tapping Enable when prompted.

4. MetaMask will request permission to access your device’s biometric subsystem—grant this permission immediately.

5. A success message appears confirming that biometric login is now active for wallet unlocking.

Understanding Biometric Login Behavior

1. Biometric login only applies to unlocking the app—not transaction signing or seed phrase viewing.

2. Each time the app is backgrounded for more than 30 seconds, it requires biometric verification upon return.

3. If biometrics fail three consecutive times, MetaMask falls back to password entry.

4. Disabling biometrics at the OS level automatically disables it in MetaMask without warning.

5. The biometric sensor does not store fingerprint or face data within MetaMask—it relies entirely on the device’s secure enclave.

Managing Biometric Credentials Across Devices

1. Biometric settings are local to each device and never synced across MetaMask accounts or browsers.

2. Restoring a wallet on a new device requires re-enabling biometrics manually after import or seed phrase recovery.

3. Removing a fingerprint or face profile from your phone disables MetaMask biometric login until a new biometric credential is registered.

4. Enterprise-managed devices may block biometric API access, preventing MetaMask from initializing the feature.

5. Jailbroken or rooted devices display a warning banner and disable biometric login by default for security compliance.

Frequently Asked Questions

Q: Does biometric login protect my private keys?A: No. Biometric login secures app access only. Private keys remain encrypted using your wallet password and are never exposed to biometric subsystems.

Q: Can I use biometrics to approve transactions?A: Not currently. Transaction confirmations require explicit password input or hardware wallet interaction—biometrics serve only as an unlock gate.

Q: What happens if I lose access to my biometric sensor?A: You can still unlock MetaMask using your wallet password. Biometric failure triggers fallback authentication without wallet lockout.

Q: Is biometric login available on MetaMask Desktop?A: No. This feature is restricted to MetaMask Mobile versions 6.0.0 and later on supported iOS and Android platforms.