If your not fimilar with Tango, its a free app that allows free video calls  with anyone who has downloaded Tango to their iPhone, iPod touch, iPad, Android phone or tablet, Windows Phone, or Windows PC.  So if your out of town or the country stay close with the Tango App.
Here are the features that Tango has to offer for  your mobile device
The ultimate in convenience – Tango works on the PC, iPhone, iPod touch, Windows Phone 7 and hundreds of and Android phones and tablets, and 3G, 4G and Wi-Fi. Just go ahead and Tango.
We find the people on Tango that you know — Using your contact list, Tango automatically finds the people you can Tango with — and you can invite anyone else by text or email. On Android phones you can even Tango directly from your address book.
Easy to use, easy to get started – There’s no log in or password, and creating an account takes just seconds. Tango works the same on every device so you don’t need to learn anything new. And it was built for “mobileâ€, making the experience simple and intuitive.
Save money – Make free video calls and free phone calls to friends and family in the same town or around the world.
Ideal for mobile – Conserves your battery, saves your mobile data plan, and is optimized for mobile networks such as 3G and 4G to give you the best calling experience — everywhere.
It’s just like being there – Tango’s high quality video makes the experience as real as if it were face-to-face.
Communicate in a way that fits the occasion – Easily switch from video to voice and back with just a tap. Use Tango on your phone, iPod touch, or tablet — your choice.
