Apple has tested multiple fold styles and device sizes, including one with a clamshell design that would be similar in size to a current iPhone that folds in half vertically, and a book-like design that folds horizontally and opens up to a larger iPad mini-sized display. In 2024, it was sounding like Apple would go with the clamshell design because it was testing prototypes in that style, but 2025 rumors have solidified around a book-like design. With the book style, the iPhone would have an outer display and camera that can be used when it's closed, and then a larger, inner display that offer