It takes two iPhone or Android phones to Tango

I have used Qik and Fring in the past to make video calls and with my new iPod touch I can make calls to other supported iOS owners with Facetime. Another company is entering the video calling market with a free client that works on both iPhone and Android devices so calls between the two hottest mobile platforms can take place. I just downloaded Tango on my HTC EVO 4G and plan to find some friends to test it out with soon. Tango works over 3G, 4G, and WiFi networks so there are no limitations as long as your iPhone or Android device has a data connection.

As stated in the press release, features of Tango include:

• Free, high-quality mobile video calls over 3G, 4G, and Wi-Fi so you can talk from wherever you are, to anyone across the globe!
• Tango between iPhones and Android phones
• It’s easy to turn video on and off during a Tango call
• Tango Contacts automatically populate from existing phone contact list
• New profile not required
• Swap the large and small screens to have a better view of what you’re showing
• Works on phones with one or two cameras so you can see yourself and the friend you Tangoed, or just share what you see
• Invite friends and others with one click by e-mail or text

As you can see, Tango works with both iPhone 4 and iPhone 3GS devices and Android devices like the Motorola Droid X, HTC EVO, HTC Incredible, and Google Nexus One. It is not clear if iPod touch devices are supported through WiFi, but these are not listed so I don't think they will work.

One of the features Tango lists that sets them apart is the ability to quickly and easily switch between a video call and a voice call. That way if the network is acting up or something you still have the ability to continue the call without video and this seems like a nice feature to have with the service. Has anyone tried Tango and what are your experiences with the program?