iPhone Duo is a foldable flagship smartphone featuring a 7.6-inch OLED display with a 120Hz refresh rate, 1878 x 2670 resolution, 430 ppi pixel density, and support for HDR10, HDR10+, Always-On Display and Dolby Vision. The foldable design also includes a secondary 1398 x 2034 display, giving users more screen space for multitasking, media and productivity. The device measures 11.3mm thick when folded and weighs 254g, with an IP68 rating and water resistance up to 6 meters. It comes in Night Sky and Star White finishes and offers 256GB, 512GB, 1TB or 2TB of storage alongside 12GB of RAM. The phone is powered by a high-performance processor with two cores reaching 4.9GHz and four efficiency cores, while direct operating system updates provide long-term software support. Connectivity includes 5G, Wi-Fi 7, Bluetooth 6, NFC, USB-C, dual eSIM support and satellite emergency SOS.

For photography, the iPhone Duo features a dual 48MP rear camera system with optical image stabilization, phase-detection and laser autofocus, RAW photography and advanced manual controls for exposure, ISO, shutter speed, focus and white balance. The cameras can record 4K video at up to 120fps and support HDR10 and Dolby Vision recording, as well as slow-motion, panoramas and time-lapse. A 12MP front camera handles selfies and video calls, while the phone also uses 3D facial recognition for secure authentication. Its 5400mAh battery supports fast wired charging and 25W wireless charging, providing a substantial power reserve for the large foldable display. Stereo speakers, GPS, a gyroscope, compass, barometer and accelerometer round out the hardware, making the iPhone Duo a versatile foldable device focused on a large immersive display, advanced cameras and premium connectivity.