If you have Auto-add friends turned ON but one of your contacts wasn't added to your friend list on LINE, check the information below.
Your contact's LINE account settings
A contact cannot be automatically added if:
• They turned OFF the Allow others to add me setting.
Check to see if they appear in your Friend recommendations
(this link is accessible on your smartphone).
• They don't have a phone number registered to their LINE account.
Your LINE account settings
The contact might have been added to your Hidden accounts or Blocked accounts list.
1. Go to the Home tab and tap Settings.
2. Tap Friends.
3. Tap Hidden accounts or Blocked accounts.
If your contact appears in one of these lists, tap Edit and select Unhide or Unblock.
Note: You won't be able to check your contact's account if it was deleted from the Hidden accounts or Blocked accounts list.
If your contact is still not automatically added to your friend list after checking the above, see this Help article
and add them manually.
Let us know if we can make it better.