Viber

I learned this iPhone application from a friend.  Since it is free and has an amazing offer, I got too excited to download it.  Luckily, I was able to try it immediately.  It really worked!  Must have app!! :)

Viber is an iPhone application that lets you make free phone calls to other iPhone users that have Viber installed. When you use Viber, your phone calls to any other Viber user are free, and the sound quality is much better than a regular call. You can call any Viber user, anywhere in the world, for free. All Viber features are 100% FREE and do not require any additional “in application” purchase.

For more details, watch the video here and visit Viber.