This service is no longer available.
In light of the situation in the Philippines, we opened a temporary service, allowing Filipino users to call regular (non Viber) numbers outside of the Philippines for free.
We would like to thank the vendors from all around the world for helping us to provide the free service:
Telecom Austria Telecom New Zealand Hutchison Global Communications Limited (HGC) Bharti Airtel Telecom Italia Sparkle Citic Netvision Cellcom Mada Communication Omantel Globe Telecom
If you have questions or feedback, feel free to visit http://helpme.viber.com/.