Apple opens pre-orders for the iPhone Duo, its first foldable phone, on Friday, with the device going on sale on October 23.
Prices start at $1,999 for the 256GB model. The first release covers about 70 countries and regions, with a further 28 markets to follow later.
The phone has a 5.4-inch display on the outside and opens to a 7.6-inch screen inside. Apple says the battery lasts up to 44 hours of video playback on the outer display and 31 hours on the inner one.
It runs foldable-specific features in iOS 27, including Split View for running two apps side by side. Apple has said the iPhone Duo will work with the USB-C Apple Pencil, making it the first iPhone to support a stylus, but that support will arrive in a software update later rather than at launch. The phone has a nano-texture finish on the inner display and two 48-megapixel rear cameras, with no telephoto lens.
Supply is expected to be limited. Reports say assembly yields are only slightly above 60 percent, and Apple's chief operating officer Sabih Khan visited Foxconn's Zhengzhou plant this month to oversee production, according to industry reports. Analysts estimate Apple could sell around 6 million units by the end of 2026.
Several questions remain unanswered ahead of release, including real-world battery life, how the hinge and display hold up over time, dust resistance and how well third-party apps work on the larger screen.
Apple is planning in-store demonstrations at selected stores before the phone goes on sale.