http://www.techxilla.com/2010/10/05/how-to-make-face-time-type-calls-from-iphone-to-android-symbian-windows-7-mac-os-x-and-vice-versa/
Face-Time is no doubt one of the most innovative feature included in iPhone 4, unfortunately this feature is currently not available is some of the parts of the world but you don't have to worry about that any more, as you can still make Face-Time like calls from your iPhone 4 to any Android, Symbian, Windows phone or even to Mac OS X, But how?
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