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iOS 15: New Features - Everything You Need to Know
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iOS 15 and iPadOS 15 review: foundational fixes - The Verge
iOS 15 is available today - Apple
MacRumors.com on Twitter: "A list of devices rumored to be compatible with iOS 15. Notably, Apple is expected to drop support for the iPhone 6s, 6s Plus, and 2016 iPhone SE. #iOS15