Select 
> Social.
Select an online friend's profile picture and Link Profile to Contact.
From your contacts list, select the contact to which to link the profile.
You can link your online friends' profiles from social networking services to their contact info in your phone. After linking, you can view their contact info directly from the Social app, and see their latest status updates in your contacts list.
Select > Social.
Select an online friend's profile picture and Link Profile to Contact.
From your contacts list, select the contact to which to link the profile.