Losing your LINE password can be a serious issue, preventing you from logging in during a device upgrade or app reinstallation. Account recovery becomes particularly difficult if your registered email address or phone number is no longer accessible.
In this article, we explain the specific procedures for resetting your password using your email address or phone number. We also introduce essential preventive measures to ensure you never lose access to your account again.
Common Issues When You Forget Your Password
Failure to log in to LINE often stems not just from a forgotten password, but from a lack of necessary recovery information.
| Issue | Description |
| Forgotten Password | Entering the wrong password or being unable to identify which password belongs to LINE due to password reuse across multiple services. |
| Outdated Email Address | The email address registered for password resets is no longer active or accessible. |
| Changed Phone Number | Your current phone number differs from the one registered, making it impossible to receive SMS verification codes. |
| Incomplete Transfer Setup | Failing to enable the “Account Transfer” setting before switching devices, resulting in a reset of login information on the new terminal. |
Emergency Response: Steps to Reset Your Password
Password resets on LINE are primarily performed using either your registered email address or phone number.
Step 1: Navigate to the Password Reset Screen
- Tap “Log In” on the LINE app startup screen.
- Tap “Forgot password?” or “Reset password” located at the bottom of the login screen.
Step 2: Choose Recovery Method and Set a New Password
- Enter Your Registered Email: Type in the email address currently linked to your LINE account and tap “OK.”
- Check Your Inbox: An email containing a password reset URL will be sent to that address.
- Tap the URL in the Email: Click the link provided in the email to be redirected back to the LINE app.
- Set a New Password: Follow the on-screen instructions to enter and confirm your new password.
What if my email is inaccessible or not registered?
If your email cannot be used or was never registered, LINE login relies on Phone Number Authentication.
- If you successfully log in via your phone number, immediately go to Settings → Account to register a current email address and a new password.
- If both your phone number and email address are unavailable, account recovery becomes extremely difficult. Your only remaining option is to contact LINE via their official “Contact Form.”
💡 Prevention: Habits to Avoid Future Password Issues
To ensure the continued safety of your LINE account, implement these preventive measures immediately:
- Register a Strong Password and Email (MANDATORY):
- Set a Unique Password: Use a complex password (mixing uppercase, lowercase, numbers, and symbols) that is not used for other services.
- Keep Email Updated: Go to Settings → Account and ensure your current, active email address is registered.
- Auto-Backup Chat History (MANDATORY): Set up automatic backups to iCloud (iPhone) or Google Drive (Android) via Settings → Chats → Chat history backup. This is your safety net if you are forced to reinstall the app.
- Utilize Password Managers: Instead of memorizing complex codes, use built-in tools like iCloud Keychain or dedicated password manager apps to store your credentials securely.
- Verify Transfer Settings: If you anticipate a device upgrade or repair, check Settings → Account transfer to ensure the toggle is ready to be turned on when needed.
By taking these precautions, you can avoid password-related stress and keep your LINE account protected.
