The first iOS 26.4 beta is landing in two weeks with the feature I bought my iPhone 16 Pro Max for

The first stages of Siri's AI overhaul should arrive with iOS 26.4, and the first beta of that is reportedly just weeks away.
MacRumors

Apple Seeds First Betas of iOS 26.4 and iPadOS 26.4 to Developers

Apple today seeded the first betas of upcoming iOS 26.4 and iPadOS 26.4 updates to developers for testing purposes, with the software coming less than a week after Apple released iOS 26.3 and iPadOS ...