Open Viber on your phone
Tap the Contacts tab
Tap the Add Contact icon
Enter the person’s name and phone number
Save the contact
If the person is already on Viber, they will appear in your contacts list
To add from your phone contacts, sync your phone contacts with Viber
To add from a chat, tap the contact name or number and choose Add to Contacts
To add a new contact manually, open your phone’s Contacts app and save the number there
Refresh Viber contacts if the new contact does not appear immediately