Apple adds horizontal Reachability mode to iPhone Duo in iOS 27.3 beta

Apple released the first developer beta of iOS 27.3 this week, introducing a redesigned Reachability mode tailored specifically for the iPhone Duo. The software update addresses usability complaints following the device's launch, where users struggled with one-handed operation on its wide layout. Apple plans to release the final version to the general public next month, with 9to5Mac reporting mid-December as the likely window. [1][2]

Unlike standard iPhones that shift screen contents downward, the iPhone Duo feature functions horizontally. A short swipe left from the left side or right from the right edge shifts content toward the user's preferred thumb, benefiting left-handed users who previously faced a taskbar locked to the right side. The setting is located in Accessibility settings and operates across both the 5.4-inch outer display and the 7.6-inch nano-textured inner display. [1][2]

Beyond interface tweaks, iOS 27.3 significantly expands Siri AI integration across Apple platforms. [1]