iOS has had the ability to opt out since iOS 4. On any iDevice, go to http://oo.apple.com/. It achieves the same thing. Only with iOS 6, they put it into the Settings.
iOS has had the ability to opt out since iOS 4. On any iDevice, go to http://oo.apple.com/. It achieves the same thing. Only with iOS 6, they put it into the Settings.