Ooma lets you make international calls anywhere in the world by subscribing to one of its international calling plans or loading up your prepaid account with credit. Additionally, you can call other Ooma users for free anywhere in the world. If you plan on traveling, you can take your Ooma Telo Air device with you, plug it into broadband in another country, and make or receive calls using your phone number. Alternatively, you can use the Ooma Mobile app for Android or iOS to make free calls back home through Wi-Fi connections.