Apple’s first foldable iPhone, widely expected to launch as the iPhone Ultra or Duo, is set for announcement at the company’s September 9, 2026 event alongside the iPhone 18 Pro models. Credible supply-chain and analyst reports, including from Bloomberg’s Mark Gurman, indicate the book-style device—with a roughly 5.5-inch cover display unfolding to about 7.8 inches, advanced hinge, reduced crease, and A20 Pro chip—has cleared late-stage testing and remains on track for fall availability starting near September 18. This timing follows years of rumors about manufacturing hurdles like the hinge mechanism, which earlier reports suggested could push release into December or 2027. Traders are pricing in strong odds of a 2026 debut because Apple is entering a mature foldable segment led by Samsung’s eighth-generation Galaxy Z Fold, where premium pricing above $2,000 and limited initial supply are typical for first-generation hardware. Key near-term catalysts include the live event reveal and any supply updates that could still shift availability.