Free Phone Calls Anywhere in world From Your iPhone, iPad and iPod touch with Viber

You can call any Viber user anywhere in the world, for free. Viber is available to install for free on your iPhone, iPad or iPod touch, all you have to do is provide your phone number meaning.

One cool feature of Viber is even when the app is closed and not running in the background, you can still receive calls through the service. This is achieved by sending a push notification via Apple’s servers, meaning a ring is generated and as soon as “Answer” button is tapped, the app launches and a connection is made in seconds. 

So, unlike Skype, no registration is necessary, since it'll be able to do so automatically. You'll be able to make calls over 3G and Wi-Fi, though you'll need to make sure your data package offers you enough data or you'll be facing a rather hefty phone bill. 

The Call quality is also excellent and app is currently compatible with iOS devices running iOS 3.0 or later and a BlackBerry and Android version is also on the way. Video after the jump.