For the safety of your Line account, it’s better to change your password from time to time.
That’s why we explain with simple steps how to modify your password using a the iPhone app:
 1  Open the app > Settings
 2  Accounts
 3  Change Your Email
 4  Change your password
is hidden in the Change your email feature.
 5  Enter your current password
to identify yourself
 6  Enter 2 times the new password that you want
 ✓ Result
Once you confirm now, your password will be modified immediately.
Source screenshots (& thanks to): the iPhone app from Line