Apple has rolled out the iOS 26.4 Beta 4 update to developers, focusing primarily on detail refinements. Key changes include expanded emoji options, improved naming for accessibility features, and adjustments to RCS encryption testing. The update introduces a "Reduce Bright Effects" option, offering a more user-friendly experience for those with visual sensitivities. Additionally, several new emojis have been added, and the usability of some existing emojis has been enhanced. Notably, the RCS end-to-end encryption testing feature has been removed and will not be included in the official release of iOS 26.4; instead, it is planned for a future version. The official release of iOS 26.4 is expected to be rolled out globally between March and April 2026. Major features like the rumored AI-upgraded Siri did not appear in this beta version, and whether they will be included in the official release remains to be seen.