Viber is a cross-platform VoIP (voice over IP) application that will let you send free messages and make free calls to other Viber users on any device, network, or in any country in which you happen to be.

Viber will sync all of your contacts, messages, and call history directly with your mobile device enabling you to quickly get back to your day without missing a text or phone call.

While using Viber, you will be able to enjoy some of the best-quality HD voice calls, video calls, utilize text (for free), photo and sticker messages, as well as the seamless transfer of ongoing calls between devices.

Viber also adds a nice level of privacy by allowing you to set 'Disappearing Messages' with its added self-destruct timer.