With Vonage Extensions you can extend the benefit of the same money-saving rates of your Vonage home calling plan to any phone, even mobiles, for no extra charge. Vonage Extensions is included with every Vonage calling plan, and allows you to register for free one non-Vonage telephone number (like your mobile phone) to your Vonage plan.
Your Vonage Extensions phone will have the same calling plan as your Vonage home calling plan, so you can make calls just like you would from your Vonage home line. As an added bonus, if you have one of the international plans, like Vonage World or World Premium Unlimited, you can enjoy unlimited1 international calling from your mobile phone extension to all of the unlimited1 calling countries available under the plans.