Moreover, you don’t need to add contact list to Viber, it’ll use your contact list and add a Viber logo to the contact, if Viber installed. Besides that, you don’t even need to run the app to receive phone calls, because it has a push notification service from Apple’s servers. You can call any Viber user, anywhere in the world, for free, and, of course, with a data connection. Download Viber from App Store. Watch below video for more detailed information.
[Via]
