The working of this application is pretty simple in which the first part is installation of this app on the iPhone and the best part is it has got no registration procedures. Because this app Viber will use the existing contacts and favorites of the user from contacts list to provide standard voice calls from the app. There will be a Viber logo besides the contact who uses it.
In terms of the call quality this app scores more than 3G and Wi-Fi networks and is sure to be downloaded from iTunes.
Download the Viber App for FREE.