iOS 27 Beta 4 Released with Siri AI

Apple seeded the fourth iOS 27 and iPadOS 27 betas to developers, two weeks after the third beta. The update introduces Siri AI, a rebuilt assistant with on-screen awareness and a dedicated Siri app. Performance improvements include faster app launches, AirDrop transfers, and Wi-Fi-to-cellular transitions. Liquid Glass design gains a transparency slider.