The iPhone 7 is just a couple of months old, which means that we are due for a fresh round of rumors about next year’s model. Today The Wall Street Journal reports that Apple is testing out “more than 10” different prototypes—presumably this includes not just next year’s phone, but prototypes for phones beyond that as well as some that will never see the light of day—and that at least one of those prototypes includes a curved OLED screen.