History Of iPhone Operating System

History-Of-iPhone-Operating-System
iPhone OS is a mobile phone operating system created and developed by Apple Inc. It was initial release in June 29, 2007. This type of operating system is used in iPhone, iPad, and iPod touch. It is the second most powerful mobile phone operating system in all over the world by sales, after Android. Major versions of iPhone operating system are released annually basis. The current release, iOS 9.3, was released on March 21, 2016.

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