iPhone Duo Has Two Always-On Displays: ProMotion to 120Hz, Four Light Sensors and the Numbers Apple Left Out

The iPhone Duo is the first iPhone with two Always-On displays. Apple lists Always-On and ProMotion adaptive refresh up to 120Hz for both the 7.6-inch folding inner display and the 5.4-inch outer display, and it has not published how the two screens divide that job between them. Both iPhone Duo displays run ProMotion to 120Hz and Always-On. Image:...