Some iOS 15 features require an A12 Bionic-powered iPhone or later

iOS 15 boasts a lot of features and offers the twin benefit of working on a lot of iPhones stretching back to models released six years ago. But not all of those features are going to be available on every iPhone that supports iOS 15.

Similar to how some macOS Monterey features are exclusive to M1-powered Macs, there are some new capabilities in iOS 15 that require newer iPhones.
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