

The interface looks like your normal iPhone phone app, but it's all purplish. But once you have it activated, anyone who uses iOS (or even Android in the near future) can communicate with you. You don't have to have your app active, as it uses push to notify you of a call, using a ringtone. Any contact that is also using viber, will have an icon showing (as you can see above). You can switch from using internet to GSM when calling as well.
So, get your distant relative or mate using a cheap iPhone 3G and install this app for him and you can call him.

Help

