The iPhone Duo is Apple’s first foldable phone and its most significant change to the iPhone’s physical design in years. Closed, it uses a 5.4-inch outer display in a body Apple compares to the size of a passport. Opened, it becomes a 7.6-inch canvas for media, games, reading, and two-app multitasking.

Both screens use the same aspect ratio, allowing content to scale more naturally as the device opens. The outer display provides 90 percent of the screen area of iPhone 18 Pro, while the inner display is 50 percent larger than iPhone 18 Pro Max. A nano-texture finish is intended to reduce glare on the folding panel.

The dual-display design changes the camera experience. Users can preview a rear-camera selfie on the outer screen, show subjects a live framing preview, or share a FaceTime call across both displays. The phone can also support itself at different angles for hands-free calls, long video captures, and viewing without a separate stand.

Inside, A20 Pro works with a custom vapor chamber and dual-battery architecture. Apple’s N1 networking chip adds Wi-Fi 7, Bluetooth 6, and Thread, while the C2 modem handles cellular connectivity. The 48-megapixel Fusion Main camera supports 4K video at up to 120 frames per second in Dolby Vision.

The body uses grade 5 titanium and comes in star white or night sky. Prices begin at $1,999 in the United States for 256GB, with 512GB, 1TB, and 2TB options available. Pre-orders start October 16, followed by availability on October 23 in the first group of markets.

The Duo’s central promise is not simply a larger display. Apple is betting that consistent app behavior, familiar iOS interactions, and tight hardware integration can make a foldable easier to understand. Durability, crease visibility, battery performance, and app adaptation will still need independent long-term testing before the device’s value becomes clear.

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