appleinsider.com
How to use iPhone Duo Reachability in iOS 27.3 beta
Apple’s iOS 27.3 beta introduces Reachability for the iPhone Duo, a foldable device with a large internal display. The feature temporarily shifts the screen’s left or right side toward the opposite edge with a short swipe, enabling single‑hand access to the entire interface. Users enable it via Settings → Accessibility → Reachability. This horizontal reachability mirrors the vertical Reachability already available on other iPhones, addressing thumb‑reach limitations on the Duo’s expansive screen.