The iPhone Duo is Apple’s first foldable phone, designed to shift between a compact handset and a larger screen for video, multitasking, and games. Apple has announced October 16 as the preorder date and October 23 as the availability date for the first wave of markets, but U.S. availability, carrier terms, and pricing have not been confirmed in the available information.
A phone that opens into a larger workspace
Closed, the iPhone Duo uses a 5.4-inch external display for ordinary phone tasks. Opening it book-style reveals a 7.6-inch inner panel, giving the device a more tablet-like canvas without requiring a separate mobile computer. Both OLED displays support ProMotion, while peak outdoor brightness is rated at up to 3,000 nits.
- 5.4-inch outer OLED display for use while the phone is closed
- 7.6-inch inner OLED display for viewing content and multitasking
- ProMotion support on both displays, with up to 3,000 nits of outdoor brightness
- Titanium construction and eSIM-only cellular connectivity, with no physical SIM-card slot
Sustained performance for the larger display
Apple pairs the foldable design with its A20 Pro chip, the same processor used in the iPhone 18 Pro models, and a vapor-chamber cooling system. The company is positioning that combination for sustained gaming performance, split-screen work, and on-device AI processing—areas where the expanded inner display could be more useful than a conventional phone screen.
Battery estimates vary substantially by the display in use. Apple rates the Duo for up to 31 hours of video playback on the inner screen or up to 44 hours on the outer display. Those are company claims rather than independent test results.
A 256GB model has been listed at €2,299 in Germany, but that figure does not establish U.S. pricing. For prospective buyers, the iPhone Duo’s appeal will depend on whether Apple can make its larger open-screen experience compelling enough to justify a premium foldable-phone price—while key U.S. launch details remain unknown.
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