Although for now it is only available to application developers; public beta tests should begin soon. Other than fixing multiple lesser and greater glitches, iOS 11.4 beta also offers a variety of new functions: support for AirPlay 2 (wireless sound), iCloud messages and ClassKit framework as well as, last but not least, new Siri commands.

Other than the 11.4 beta, Apple is also working on watchOS 4.3.1, macOS 10.13.5 and tvOS 11.4. Their official release date are unknown. Possibly during the WWDC 2018 conference?