Apple announced its first foldable iPhone, dubbed the iPhone Duo, on September 9, 2026, under new CEO John Ternus, marking the device's biggest design shift since the original iPhone. The book-style model features a 7.6-inch inner display when unfolded, starts at $1,999, supports multitasking akin to iPad apps, and ships October 23 following pre-orders in mid-October. This late entry into the foldable segment follows years of supply chain reports confirming a 2026 timeline alongside the iPhone 18 Pro series, despite earlier production hurdles around hinges and displays. Traders see strong consensus driven by the confirmed launch event and imminent availability, though limited initial supply and the device's premium positioning relative to Samsung and Google rivals could influence adoption metrics tied to any resolution criteria.