Viber Out is a service offered by Viber for people to call any phone numbers ((landline or mobile) or non-Viber numbers directly from Viber. Viber offers a low, competitive rates with this service. around the world.
You can purchase Viber Out credits which will be added to you account balance. Once you have the credit, you can make to any number in the world by taking advantage of Viber’s low rates.