Viber is a unique type of application for Android and iOS which allows you to have free calls and sms globally, the only requirement is that you either have a 3G or wifi connection ready. The thing which differentiates Viber from other apps like Nimbuzz, Skype, Gtalk or Yahoo is that it uses your Cell Number, rather than any User ID. If you use Viber software in your mobile then this Viber Tips Tricks application will help you a lot!... You will become more familiar with Viber through this application.