Once you install the Tango app on your machine, you can start using it straight away as an account is easily created. You don’t need to create a username and password – Tango recognizes you through your mobile phone number.
Once installed, the app searches your existing contact list for people who are already using Tango and marks them as the buddies you can communicate with using your new app. You can also invite other non-Tango people through text messages.
What does it cost? At present, it costs nothing. All you do with Tango is free, but you need to be mindful of the data plan consumption if you are using 3G or 4G to make your calls. As an estimate, you can make 450 minutes of video calls using 2 GB of data.