The iPhone Duo's inner display supports Edge Light, a video-call setting that first appeared on Apple silicon Macs in 2025.
Miles Franklin spotted the feature. It is optional. On calls in apps like FaceTime, Edge Light lights up the borders of the screen so your face is evenly illuminated in low light. In practice, it is a virtual ring light, the kind of lamp people clip to a desk or stand behind a camera.
The idea is not new for phones, which have long used a bright screen as a stand-in for a selfie flash. What is new is the tool's origin. Edge Light started on the Mac, and its arrival on the Duo shows Apple moving a software feature from one product line to another rather than building something separate.
That is a modest move, and it suits the problem. Video calls usually happen indoors, often in dim rooms, and the screen you are looking at is already pointed at your face.
Some details are unclear: how bright the effect gets, and which apps beyond FaceTime-style calling can use it. Those answers will decide whether Edge Light is a real fix for bad lighting or a small convenience.