Motorola Moto G — fb contacts sync

This are the steps to sync facebook contacts phone number to mobile contacts:
1. Menu >Settings> Account & Sync.
2. Click on Facebook. If you don’t see Facebook in the list of accounts it is likely that you haven’t yet added your Facebook account to your Android Accounts – tap on the option at the bottom of the screen and do so now.
3. Select the “Sync contacts” option.
4. Click “Sync Now”.

I hope this helps you.