iPhone Duo transforms into tablet: Apple's foldable flagship combines compact phone and large display in one device
Apple's first foldable iPhone, the Duo, opens book-style from a compact 5.4-inch external screen to a 7.6-inch internal display with fold-specific iOS 27.1 features including Split View and adaptive multitasking. The device replaces Face ID with Touch ID, incorporates an A20 Pro processor with vapor-chamber cooling, and offers dual-battery architecture delivering up to 44 hours of video playback on the outer display. Pre-orders begin October 16 with general availability on October 23.
The iPhone Duo represents Apple's entry into the foldable smartphone market with a book-style mechanism that transitions between a pocket-sized 5.4-inch display and an expansive 7.6-inch screen. The internal display offers considerably more usable area than the current flagship iPhone 18 Pro Max, positioning the device as a productivity tool alongside a traditional phone. Apple has engineered the device with a reinforced hinge and dual-battery system split across both halves to manage power distribution efficiently across the larger form factor.
The software experience has been rebuilt specifically for the foldable format through iOS 27.1, which includes adaptive features like Split View multitasking and hands-free video calling. Beyond display innovations, Apple replaced Face ID with Touch ID integrated into the side button and introduced camera functions designed around dual-screen functionality. The A20 Pro processor includes vapor-chamber cooling to manage thermal demands across extended use sessions.
The iPhone Duo could significantly reshape consumer expectations around smartphone versatility, potentially attracting professionals and multitasking-focused users willing to pay premium prices for expanded screen real estate without separate device purchases. Early adoption patterns may influence whether competitors accelerate foldable development or whether mainstream consumers remain hesitant about durability concerns with folding mechanisms. Market penetration across 70+ countries suggests Apple is positioning foldables as a mainstream category rather than experimental, which could drive broader ecosystem shifts toward fold-optimized apps and services.