Apple has started a brand new generation of developer betas, with iOS 26.4, iPadOS 26.4, watchOS 26.4, tvOS 26.4, visionOS 26.4, and macOS Tahoe 26.4 expected to include a Siri update.
OS 26.4 enables Stolen Device Protection by default, adding biometric verification and security delays to critical iPhone settings, alongside encrypted RCS and Podcasts video support.
iOS 26.3 Is Rolling Out Right Now. Here's Everything New to Expect on Your iPhone