Archived
Archived contacts live here, off your Active list and unmessageable until you bring them back. Restore them, or delete them for good.
The archived list
Open Contacts → Archived. It shows the same columns as the Active list: name, phone, and your featured fields. Search by name or number, and tick rows to select them.
Unarchive contacts
Select contacts
Tick the archived contacts you want back.
Unarchive
Click Unarchive, then Proceed.
Unarchived contacts return to your Active list and can be messaged again.
Delete contacts
Select contacts
Tick the contacts to remove.
Delete
Click Delete, then Proceed.
Deleting permanently removes the contacts. This can't be undone.