Turning on the Passcode lock setting in LINE will prompt you for a four-digit passcode or biometric authentication every time you open the LINE app.
To set a passcode lock
1. Tap Settings > Privacy.
2. Turn ON Passcode lock.
3. Enter the passcode you want to set twice.
To change your passcode lock
1. Tap Settings > Privacy.
2. Tap Change passcode.
3. Enter your new passcode twice.
To remove the passcode lock
1. Tap Settings > Privacy.
2. Turn OFF Passcode lock.
Be sure to keep your passcode safe so you don't forget it. If you don't know your passcode, you'll need to delete and then reinstall the LINE app, resulting in any chat history that you haven't backed up being deleted.
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