iPhone Duo.

Apple’s September 9 press release confirms the name iPhone Duo for its first foldable iPhone.

Yes. The 256GB model starts at HK$17,499 in Hong Kong and RMB 15,999 in mainland China. Compare all storage tiers across four regions on our price page.

Preorders opened October 16 and sold out quickly. iPhone Duo launched October 23, and first-wave preorders were delivered. As of October 16, new orders on the US Apple Store were quoted for late January 2027. Another 28 markets follow on October 30. Get Ready opened October 12 as store setup, not an earlier sale.

Split View is supported, but this is still iOS. The iOS 27.2 release candidate already supports Apple Pencil (USB-C) on both the inner and outer displays, according to hands-on testing by analyst Max Weinbach, not an Apple announcement. A public release is expected around the end of October. The launch version of iOS does not include Pencil support until 27.2 ships, so do not assume your iPad workflow is available on day one. Existing apps run on Duo. Apple says a build made with the iOS 26 SDK or earlier appears in the center of the open display with empty space around the window, a build with the iOS 27 SDK fills most of the inner display, and the iOS 27.1 SDK or later extends an app across the full display. Whether a given everyday app is rebuilt for that full display at launch depends on each developer. In the App Store, look for the “Made for iPhone Duo” label, which Apple says is for apps built with the iOS 27.1 SDK or later and optimized for Duo. Apple highlighted Netflix, Prime Video, Zoom, and Slack among more than 50 apps that are already optimized or soon to be optimized, and said Microsoft Word and Outlook will get a desktop-class experience in the coming weeks.