You are downloading the Tango Secret XAP file v18.104.22.168 for Windows Phone. Tango Secret is a free and useful Education app: Tango is an entertaining, easy to use, free video calling service that connects people around the world with friends and family from wherever they ... You can now download the offline XAP file to install & try it.
Download Locations for Tango Secret 22.214.171.124 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Tango Secret XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.