To view where a phonebook contact was imported from, see this info. If you need to transfer contacts and media from one device to another, follow these step-by-step instructions before activating the new device.
Imported contacts can originate from multiple sources (e.g., work email, Facebook, Google, apps, etc.). View this info to determine the import source.
From a Home screen, tap Contacts (located at the bottom).
If unavailable, navigate: Apps > Contacts.
Tap a contact.
Tap the Edit icon (located in the upper-right).
View the contact source (located above the contact name).