![Tested: iOS 11.3 Beta dramatically improves (or unlocks) the performance of older devices by a whopping 2.5 times. | by Murukesh Sadasivan | Medium Tested: iOS 11.3 Beta dramatically improves (or unlocks) the performance of older devices by a whopping 2.5 times. | by Murukesh Sadasivan | Medium](https://miro.medium.com/max/1400/1*1gTBUHOQoUT_qkWtfes2ew.jpeg)
Tested: iOS 11.3 Beta dramatically improves (or unlocks) the performance of older devices by a whopping 2.5 times. | by Murukesh Sadasivan | Medium
![My friend update is iPhone 6s from iOS 11 to iOS 15 it finished updating but after it asked for the passcode the phone freezes shows the buffering symbol and takes him My friend update is iPhone 6s from iOS 11 to iOS 15 it finished updating but after it asked for the passcode the phone freezes shows the buffering symbol and takes him](https://i.redd.it/hxa48zrenxk81.jpg)
My friend update is iPhone 6s from iOS 11 to iOS 15 it finished updating but after it asked for the passcode the phone freezes shows the buffering symbol and takes him
![Apple Releases iOS 11 With Revamped Lock Screen, Fresh App Store, New Siri Voice, and Updated iPad Interface - MacRumors Apple Releases iOS 11 With Revamped Lock Screen, Fresh App Store, New Siri Voice, and Updated iPad Interface - MacRumors](https://images.macrumors.com/t/jdDHwFHPbfs7Ngtpc8dWpt7hIwY=/1200x1200/smart/article-new/2017/07/ios-11.jpg)