Learn how to link contacts on your Nokia Lumia 720. Do you have separate entries for the same contact from different social networking services or mail accounts? You can link multiple contacts so that their info is in a single contact card.
Tap People icon, and swipe to all.
Tap the main contact you want to link to and Link icon.
Tap choose a contact and the contact to be linked.
Tap the main contact and Unlink icon, and tap the contact to be unlinked and unlink.