I fully agree that Skype is much better, I'm not using Tango myself (only installed it in my PC to understand what it is), but for example my wife and all her friends use and love it. Tango is very popular in Asia and Latin America, it has over 40 million users and those will not change their phones to something that does not support Tango. It has a very convinient feature that makes it easy to use: At installation SW checks contact list in the phone and adds automatically to Tango-contacs all those numbers that are already using Tango. Luckily iPhone 5 is also not supported yet, so if acting fast to get Tango supported WP8 devices could get some advantage. And Nokia announced today a low-end WP8 phone Lumia 620 that is expected to be very popular in those areas where Tango is also popular.