The Unlimited Corporate Premium Plan:

The Great link Unlimited Corporate Premium Plan lets you talk all you want. For just $399.00 you get unlimited calling to more than 50 countries including the United States.

Unlimited calling to more than 50 countries including the United States:
Australia	Netherlands
Austria	Norway
Belgium	Singapore
Canada	Spain
Chile	Sweden
China	Switzerland
Denmark	Taiwan
France	United Kingdom
Germany	United States
Ireland	Vatican City
Italy	Venezuela
Argentina	Luxembourg
Brazil	Malaysia
Czech Republic	New Zealand
Finland	Poland
Greece	Portugal
Israel	San Marino
Japan	South Korea
Colombia	Costa Rica
Cyprus	Hong Kong
Hungary	Iceland
Indonesia	Macao
Mexico	Nigeria
Peru	Russia
Saudi Arabia	Singapore
South Africa	Thailand

• All basic and advanced features included free
  
  
• Calls to other Great Link Hotline users, even in other countries, are always included in your plan.
  
  
• Great Link Hotline calls to mobile phone numbers outside the US and Canada are not included in the Unlimited World/World Plus Plans.