iPhone Duo specifications

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Main article: iPhone Duo

This page collects the published technical specifications of the iPhone Duo, Apple's first foldable iPhone, as listed on Apple's specification sheet and product page.[1][2] Figures that Apple has not published are marked as such. Prices are on the price by country page, and a shorter summary appears in the main article.

Displays

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iPhone Duo closed and open, comparing the outer and inner displays
Outer 5.4-inch and inner 7.6-inch displays. Apple press image.
Inner display (open) Outer display (closed)
Diagonal (marketing) 7.6 in 5.4 in
Diagonal (as a rectangle) 7.58 in 5.36 in
Panel Super Retina XDR foldable OLED Super Retina XDR OLED
Resolution 2670 × 1878 px, 430 ppi 2034 × 1398 px, 460 ppi
Refresh rate ProMotion, adaptive up to 120 Hz ProMotion, adaptive up to 120 Hz
Always-On display Yes Yes
Peak outdoor brightness 3000 nits 3000 nits
Surface Nano-texture matte finish Ceramic Shield 2
Front camera Under-display FaceTime camera 12 MP Center Stage camera

All display figures are from Apple's specification sheet.[1] Apple states that both panels share one aspect ratio, that the inner display is about 50 percent larger than the iPhone 18 Pro Max display, and that the outer display has roughly 90 percent of the screen area of the iPhone 18 Pro.[2] The inner cover is a stack of ten thin layers, including a custom polymer that Apple describes as 40 percent stiffer than the industry norm, a scratch-resistant coating over glass, and a titanium plate.[2] UNKNOWN Apple has not published a crease depth or width.[1]

Chip and memory

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Component Specification
System on a chip Apple A20 Pro, 2 nm process[3]
CPU 6-core (2 performance, 4 efficiency); Apple claims up to 20 percent faster than A19 Pro[1][2]
GPU 7-core; Apple claims up to 40 percent faster than A19 Pro[2]
Neural Engine Dual 16-core; Apple claims twice the on-device AI compute[2]
Memory bandwidth Apple claims 50 percent higher than A19 Pro[2]
Thermal design Chip package bonded to a custom vapour chamber; Apple claims up to 35 percent better sustained performance than iPhone 17 Pro[2]
RAM UNVERIFIED Not published by Apple; third-party databases list 12 GB[4][5]
Storage 256 GB, 512 GB, 1 TB, 2 TB[1]

Body and durability

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Attribute Specification
Form factor Book-style fold, opens like a passport[3]
Closed dimensions 117.8 mm (H) × 84.1 mm (W) × 11.3 mm (D)[1]
Open dimensions 117.8 mm (H) × 164.6 mm (W) × 5.2 mm (D)[1]
Weight 254 g[1]
Frame Grade 5 titanium, mirror-polished[3][6]
Hinge cover 3D-printed 100 percent recycled titanium, micro-blasted finish[3]
Hinge More than 100 components; supports display centre; magnet array for closure; holds intermediate angles[3][2]
Back Ceramic Shield[3]
Outer display cover Ceramic Shield 2[3]
Water and dust resistance IP68, 6 m for up to 30 minutes[1]
Colours Star White, Night Sky[3]
Buttons Side button with Touch ID; Camera Control; volume buttons (reported on the top edge)[1][6]

Cameras

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Sample photograph showing Photographic Styles texture and grain controls on iPhone Duo
Photographic Styles gain texture and grain controls. Apple press image.
Camera Specification
Fusion Main 48 MP, 26 mm equivalent, ƒ/1.6, sensor-shift OIS, Hybrid Focus Pixels; 24 MP default output, 48 MP full resolution[1]
Fusion Ultra Wide 48 MP, 13 mm equivalent, ƒ/2.2, 120° field of view, macro[1]
Telephoto None. 12 MP optical-quality 2× crop from the main camera (52 mm)[1]
Zoom range 4× optical-quality range (0.5× to 2×); digital zoom up to 10×[1]
Front (outer display) 12 MP Center Stage camera with automatic framing[1]
Front (inner display) Under-display FaceTime camera[1]
Video 4K Dolby Vision at up to 120 fps on the main camera; cinematic effects applied after capture; 4K Dolby Vision HDR time-lapse; Audio Mix[1][2]
Fold-specific features Smart Take, Duo Preview, rear-camera selfies with outer-display preview, Kid Cue, Duo FaceTime, Dual Capture, Siri camera mode[3][2]

Battery and charging

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Attribute Specification
Architecture Two cells, one per half, with energy rebalancing[2]
Capacity UNKNOWN Not published by Apple[1]
Video playback Up to 31 hours (inner display); up to 44 hours (outer display)[1]
Mixed use About 24 hours with both displays used equally[3]
Wired charging Up to 50 percent in about 20 minutes with a 60 W or higher USB-C adapter[1]
Wireless charging MagSafe and Qi2 at up to 25 W; up to 50 percent in about 30 minutes[1]
Materials 100 percent recycled cobalt[2]

Connectivity and security

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Attribute Specification
SIM eSIM only, in every market[1]
Cellular Apple C2 modem; 5G with mmWave in the United States[1][2]
Wireless Apple N1: Wi-Fi 7, Bluetooth 6, Thread[1]
Satellite Supported[1]
Port USB-C[1]
Biometrics Touch ID in the side button; Apple Watch unlock; no Face ID[1][2]
Number transfer iPhone Handoff (iOS 27), launch carriers T-Mobile (US) and Telekom (Germany)[3]

Software

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iPhone Duo ships with iOS 27.1 and supports Split View, side-mounted controls, StandBy on either display, Apple Intelligence and the Siri AI beta.[3][2] Apple Pencil (USB-C) support for both displays is planned for a software update later in 2026.[3]

In the box

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Apple lists the phone and a 1-metre USB-C charging cable.[1]

Environment

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Apple states 35 percent recycled content by weight, 100 percent recycled cobalt in the battery and titanium in the hinge cover, 60 percent renewable electricity in manufacturing, and 100 percent fibre-based packaging.[2]

See also

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References

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  1. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab "iPhone Duo – Technical Specifications". Apple. 9 September 2026. Retrieved 11 September 2026.
  2. ^ a b c d e f g h i j k l m n o p q "iPhone Duo". Apple. 9 September 2026. Retrieved 11 September 2026.
  3. ^ a b c d e f g h i j k l m "Apple unveils iPhone Duo". Apple Newsroom. 9 September 2026. Retrieved 11 September 2026.
  4. ^ "Apple iPhone Duo – Full phone specifications". GSMArena. Retrieved 11 September 2026.
  5. ^ "Apple iPhone Duo price in India, specifications". Smartprix. Retrieved 11 September 2026.
  6. ^ a b "iPhone Duo design: 5.2 mm, Grade 5 titanium, Ceramic Shield, IP68". The Mac Observer. 9 September 2026. Retrieved 11 September 2026.