Apple announced its first foldable iPhone, the Duo, on September 9, 2026, alongside the iPhone 18 Pro models, confirming years of development into a book-style design with a 7.6-inch inner display and premium titanium build. The device, starting at $1,999 with an A20 Pro chip and eSIM-only support, enters preorders on October 16 and reaches stores October 23, directly competing with Samsung's Galaxy Z Fold lineup while leveraging Apple's ecosystem for productivity features like multi-window support. Supply constraints may limit early volumes, mirroring past staggered launches, yet the confirmed timeline and demonstrated hardware capabilities have solidified trader consensus around near-term availability amid ongoing competitive pressure from Android foldables.