Here's how to sync all your contacts with your Facebook account on your Nokia Lumia 820:
- From the Start screen, swipe to the left.
- Scroll down to and tap Settings.
- Tap email + accounts.
- Tap and hold the Facebook account to be synchronised.
- Tap sync.
- Tap the Start button to return to the Start screen.
- Swipe the screen to the left.
- Scroll down to and tap People.
That's it - your contacts have been synchronised with Facebook.