How to Block or Unblock Someone on Line App?

To Block:

Step 1: Go to Friends Tab.

Step 2: Open the contact that you want to block.

Step 3: Tap on 'little'downward arrow, and just tap on 'block' to block the person.

To unblock:

Step 1: Go to More Tab, and then Tap on Gear Icon at the top.

Step 2: Tap on 'Friends'.

Step 3: Tap on 'Blocked Users' at the bottom.

Step 5: Tap on Edit, and the Tap on 'Unblock'.

It's done.