Apple released iOS 26.4 beta 4 on March 9, making it available to both developers and public testers, along with matching beta 4 updates for iPadOS, macOS, tvOS, visionOS, and watchOS. The build adds new emoji and renames an accessibility setting, but removes the test version of end-to-end encrypted RCS. Beta 4 is the first to support iPhone 17e and M4 iPad Air. Apple previously said encrypted RCS would ship in a later update.