You can log in using the biometric information (e.g. face, fingerprint) registered on your smartphone when accessing LINE on some
sub devices and services provided by LINE.
By logging in with your biometric information, you can manage your LINE account more securely than with using an email address and password.
Note:
- Your biometric information isn't saved on the LINE app or servers.
- To use LINE on a sub device, you need to
create an account on the smartphone version of LINE.
iPhone
1. Register Face ID or Touch ID on your iPhone.
2. From your device's Settings, tap LINE and turn ON Face ID or Touch ID.
Android
1. Register your biometric information to your smartphone.
2. Allow biometrics to be used for logins in the LINE app.
Note: For details, check your phone manufacturer's website.
After configuring your device's settings, configure the following settings on the LINE app. You can only use this feature on your main device (typically your smartphone).
iPhone
1. Open LINE on the main device your account is registered to.
2. Tap the Home tab > 
> Account.
3. Tap Face ID/Touch ID > Enable.
You'll know setup is complete when you see Unlink next to Face ID/Touch ID.
Android
1. Open LINE on the main device your account is registered to.
2. Tap the Home tab > > Account.
3. Tap Link next to Device unlock method > Enable.
You'll know setup is complete when you see Unlink next to Device unlock method.
Useful info
- To only use biometrics and QR codes to log in to your account, tap Home >
> Account > and turn off Log in with password.
- Turning off Log in with password will not log you out of any devices you're already logged in to.
Steps for logging in with biometrics:
When logging in to LINE with biometrics for the first time:
PC (LINE for Windows/Mac)
1. Start LINE on your sub device.
2. Select Log in with my smartphone and enter the phone number registered to your LINE account.
3. Select Show verification code.
4. Start LINE on your main device (typically your smartphone).
5. Select the Home tab >
> Account > Pair a new device.
6. Enter the verification code that appears on LINE on your sub device into LINE on your main device.
7. Authenticate the login with biometric information on your main device when prompted to do so.
Tablet (LINE for iPad)
1. Start LINE on your sub device.
2. Enter your phone number and select Log in with smartphone.
3. Select Show verification code.
4. Start LINE on your main device (typically your smartphone).
5. Select the Home tab >
> Account > Pair a new device.
6. Enter the verification code that appears on LINE on your sub device into LINE on your main device.
7. Authenticate the login with biometric information on your main device when prompted to do so.
When logging in after the first time:
Tablet (LINE for iPad)
1. Start LINE on your sub device.
2. Select Log in with my smartphone and enter the phone number registered to your LINE account.
3. Start LINE on your main device (typically your smartphone).
4. Authenticate the login with biometric information on your main device when prompted to do so.
Tablet (LINE for iPad)
1. Start LINE on your sub device.
2. Enter your phone number and select Log in with smartphone.
3. Start LINE on your main device (typically your smartphone).
4. Authenticate the login with biometric information on your main device when prompted to do so.
“Login successful!” will appear when you're logged in. The LINE official account will also send a
login notification message to you in the smartphone version of LINE.
Useful info
If logins with biometrics have been locked, be sure to enter the passcode or PIN configured on your smartphone, which is not the same as the passcode lock for LINE.
Disabling (turning off) logins with biometrics:
You can only follow the steps below on your main device (typically your smartphone).
iPhone
1. Open LINE on the main device your account is registered to.
2. Tap the Home tab > > Account.
3. Tap Face ID/Touch ID > Disable.
Android
1. Open LINE on the main device your account is registered to.
2. Tap the Home tab > > Account.
3. Tap Unlink next to Device unlock method > Disable.
When you disable biometrics for logging in to LINE, you'll be logged out of LINE on any sub devices (LINE for iPad, Windows, Mac) you're using.
To log in to your LINE account using an email address and password, tap the
Home tab >
>
Account > and turn on
Log in with password.
Let us know if we can make it better.
Note:
- Do not enter any personal information.
- We cannot respond to comments received from this form.