On a new episode of his Power On podcast, Bloomberg's Mark Gurman said he "heard" that Apple is "looking at" the idea of a future iPhone Duo with an inner display that is "roughly half an inch" larger than the one on the existing model. iPhone Duo has a 7.6-inch inner display and a 5.4-inch outer display. Gurman does not know exactly how much larger the inner display would be on a future model, but he said it could be somewhere in the 7.9-inch to 8.1-inch range.