Apple announced its first foldable iPhone, the iPhone Duo, on September 9, 2026, alongside the iPhone 18 Pro models under new CEO John Ternus, marking the biggest design shift since the original iPhone. The book-style device features a 5.4-inch cover display and 7.6-inch inner screen, starts at $1,999, and begins shipping October 23 after pre-orders open October 16. This timeline follows years of supply-chain rumors and positions Apple against established competitors like Samsung’s Galaxy Z Fold series and Google’s Pixel Fold models. Strong pre-launch production ramp-ups and retail demo preparations signal high confidence in meeting the schedule, though limited initial supply could mirror past constrained launches. Traders monitoring resolution criteria should watch for any last-minute delays in availability or feature confirmations like Apple Pencil support.