Viber is a very COOL application!!

I use viber, an iphone application. It's a free phone call application. Similar to skype, but viber requires no login. For skype, you can call your friend for free via skype if your friends use skype and are online at that time. And viber requires none of that.

Moreover, viber uses your phone contacts and check if any of your contacts are using viber. This means that if your contacts use viber, then you can call them for FREE!!!

If your contact is using viber, you will see "Viber" after the contact name. If not, you will see what type of phone number you specified when you added the contact. If you call the contacts that don't use viber, viber will just do a normal call using iphone's phone application and your sim call plan.          

Using viber is similar to iPhone default phone application. Favorite, Recents, Contacts and Keypad are all the same as iphone's phone application. Actually, I use viber as my default phone application now.

When you use viber for the first time, you need to type in your phone number, and viber will sms an activation code to that number. This means that the number you enter could be in other phone. As long as you make sure that you got the code. Mine was actually in my older iphone3gs. (i'm using iphone4 now.)

The best thing in this very cool program is that it's FREE!!! You only need 3G or wifi. You don't need your sim in you phone at all. Now I can call my mom in Thailand from Australia for free anytime.