Tango is a video/voip app for windows phone. It let's you make free calls over 2g/3g/4g or WiFi connection.
Why should you download tango?
1) its FREE,its efficient and recieves constant updates
2) its let's you make free calls to users who have tango installed on IOS,android,WP,pc or tablet
3) its better,faster and provides more quality than viber.
http://www.windowsphone.com/en-US/apps/fe30c379-d111-427d-894f-dc3bfa0ec371
Why should you download tango?
1) its FREE,its efficient and recieves constant updates
2) its let's you make free calls to users who have tango installed on IOS,android,WP,pc or tablet
3) its better,faster and provides more quality than viber.
http://www.windowsphone.com/en-US/apps/fe30c379-d111-427d-894f-dc3bfa0ec371