iOS 27.3 beta brings one-handed Reachability to iPhone Duo display

Apple’s iOS 27.3 beta adds Reachability to the iPhone Duo, making its exterior display easier to use with one hand. The feature shifts screen content towards the user’s thumb, helping with controls that would otherwise be awkward to reach.

Users can enable it under Settings > Accessibility > Touch, then swipe outwards from either edge of the exterior display. On other iPhones, Reachability generally moves content downwards; Apple first introduced it in 2014. The iPhone Duo’s outer OLED display measures 5.4 inches.