on September 17, 2018.

Overview

iOS 11 was introduced at the Apple Worldwide Developers Conference keynote address on June 5, 2017. The first developer beta version was released after the keynote presentation, with the first public beta released on June 26, 2017.

iOS 11 was officially released by Apple on September 19, 2017.It brought many changes to iOS. Some major highlights were:
* The lock screen and Notification Center were combined, allowing all notifications to be displayed

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