You have blocked to one of your contacts, and now you want to unlock him. How to proceed?
- Sign into Facebook
- Click the gear located at the top right and select "Privacy Settings"
- Scroll to "Block Lists" > "Edit your lists" link in the section.
- Go to the Block Users and click on the "Unblock" link next to the contact of your choice.
- Validate with the Confirm button.
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