iPhone Duo review: fun to play with and cool matte inner display, but small cover display, heavier and bulkier than other phones, average cameras, and gets hot (The Verge)

The iPhone Duo represents a significant departure for Apple, a risky product that rethinks what an iPhone can be. It features a unique passport-shaped design and a large inner screen that's perfect for viewing 16:9 videos. The outer screen is 5.4 inches, while the inner display is 7.6 inches and has a matte, nano-textured coating that helps hide the crease.

The matte finish is praised for its clean look and feels solid, but it doesn't completely eliminate the crease, which is still visible under certain lighting conditions. The Duo also has an under-display camera, which becomes more noticeable under bright light. Despite its innovative design, the Duo is heavier and bulkier than other phones, and the small cover display is a downside for many users.

Overall, it's an intriguing device that pushes the boundaries of what an iPhone can be, but it may frustrate some early adopters with its size and shape.