iOS 6, rating as a mobile operating system

iOS 6 is the sixth major release of the iOS mobile operating system designed by Apple Inc., initially released on September 19, 2012. The final version of iOS 6 is 6.1.6. It was preceded by iOS 5 (final version was 5.1.1) and was succeeded by iOS 7 on September 18, 2013. New features included a new Maps application with data developed by Apple, the Passbook application for storing tickets and loyalty cards, enhancements to Siri and user-definable 'VIP' inboxes for mail from known recipients. More: en.wikipedia.org.