Apple unveils iOS 27: Gemini Siri, softer Liquid Glass, speed boost for older iPhones

Apple unveiled iOS 27 at WWDC 2026 on Monday, framing the release as a year of fixes rather than reinvention. A new slider tames Liquid Glass, a rewritten CPU scheduler delivers measurable speed gains down to the iPhone 11, and the long-delayed Siri AI finally ships—built on Apple's next-gen Foundation Models, trained in partnership with Google's Gemini, with English rolling out first.