iPhone Duo lacks several features found on iPhone 18 Pro models

Apple's inaugural foldable smartphone, the iPhone Duo, offers novel functions such as Duo FaceTime and upcoming Apple Pencil support, but it does not include a range of features available on the iPhone 18 Pro and iPhone 18 Pro Max. The Duo relies on a 48-megapixel Fusion camera with "optical-quality" 2× zoom instead of a dedicated telephoto lens that provides up to 8× optical zoom. It also lacks a variable aperture for the main camera, a higher-resolution 18-megapixel Center Stage front camera (the Duo uses a 12-megapixel sensor), and the Action button found on the Pro models. Face ID is replaced by a Touch ID button, and the device does not contain a LiDAR scanner for augmented-reality depth sensing. Additional camera capabilities such as Pro controls, ProRAW, ProRes RAW, and spatial photos and videos are also absent. Pre-orders for the iPhone 18 Pro and Pro Max begin on September 12, with shipments slated for September 18, while iPhone Duo pre-orders start on October 16 and the phone will ship on October 23.