Syncing contacts from facebook to iphone 4?

Okay I've been trying to sync my contacts on facebook to my iphone for about an hour now and it's getting entirely frustrating.
All of the tutorials I have found tell me to go to the friends menu and hit a sync button in the upper right hand corner of the screen.

There's no sync button.

So… What do I do now?

Just trying to make it clear. You have to have the contacts on your phone already. Then it'll compare their names and numbers and other info and pictures you have for them and add it to the contacts already listed. So if you have no contacts or very few then it won't sync them Also it has to be there exact facebook name as their name in your phone or it won't sync.

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