Apple’s first foldable iPhone brings a completely different design to the iPhone lineup. The iPhone Duo combines a compact outer display with a much larger folding screen, while using Apple’s latest A20 Pro chip and a dual-camera system.

With a titanium foldable design, two displays, Apple Intelligence, advanced cameras and a dual-battery architecture, the iPhone Duo is designed to be both a smartphone and a larger productivity device.

Here is a detailed look at the iPhone Duo specifications, including its display, camera, processor, battery, storage, design and connectivity.

iPhone Duo Display Specifications

The display is the biggest attraction of the iPhone Duo.

When closed, the phone has a 5.4-inch outer Super Retina XDR OLED display. When opened, it reveals a 7.6-inch inner folding OLED display, giving users a much larger area for watching videos, gaming, multitasking and working.

The inner display has a resolution of 1878 × 2670 pixels at 430 ppi, while the outer display has a resolution of 1398 × 2034 pixels at 460 ppi.

Both displays support:

• ProMotion up to 120Hz
• Always-On display
• HDR
• True Tone
• P3 wide colour
• Haptic Touch
• Up to 3,000 nits outdoor peak brightness
• 1 nit minimum brightness
• Dynamic Island
• Anti-reflective coating

The inner display also features a nano-texture finish, designed to reduce reflections and make the folding area less noticeable.

iPhone Duo Design and Dimensions

The iPhone Duo uses a titanium foldable design and weighs 254 grams.

When opened, it measures:

164.6 × 117.8 × 5.2 mm

When folded, it measures:

84.1 × 117.8 × 11.3 mm

The phone is therefore extremely thin when unfolded, while its folded design is compact enough for comfortable everyday use.

Apple also uses Ceramic Shield protection and an IP68 rating for splash, water and dust resistance.

iPhone Duo Processor: A20 Pro

The iPhone Duo is powered by Apple’s A20 Pro chip, giving the foldable phone flagship-level performance.

The A20 Pro includes:

• 6-core CPU
• 2 performance-oriented super cores
• 4 efficiency cores
• 7-core GPU
• Neural Accelerators
• Dual 16-core Neural Engine
• Hardware-accelerated ray tracing

This combination is designed for demanding gaming, photography, video processing, multitasking and on-device AI.

The Neural Engine also plays an important role in Apple’s latest AI features and computational photography.

iPhone Duo Camera Specifications

The iPhone Duo features a 48MP Dual Fusion camera system.

The main camera is a 48MP Fusion Main camera with a 26mm focal length, ƒ/1.6 aperture, sensor-shift optical image stabilisation and Hybrid Focus Pixels.

It can capture both 24MP and 48MP high-resolution photos.

The main camera also provides a 12MP optical-quality 2x telephoto option, giving users additional flexibility when photographing subjects farther away.

48MP Ultra Wide Camera

The second rear camera is a 48MP Fusion Ultra Wide camera with:

• 13mm focal length
• ƒ/2.2 aperture
• 120-degree field of view
• Hybrid Focus Pixels
• 24MP and 48MP photo capture
• Macro photography

The camera system supports up to 2x optical-quality zoom in, 2x optical zoom out and up to 10x digital zoom.

iPhone Duo Camera Features

Apple has also added several computational photography features, including:

• Smart Take
• Duo Preview
• Photographic Styles 3
• Smart focus tracking
• Night mode
• Portrait mode
• Focus and Depth Control
• Photonic Engine
• Deep Fusion
• Smart HDR 5
• 48MP macro photography
• Panorama up to 63MP

The folding design also makes the camera more versatile because the outer and inner displays can be used in different ways while taking photos.

iPhone Duo Video Recording

The iPhone Duo can record 4K Dolby Vision video at multiple frame rates, including up to 120fps using the Fusion Main camera.

It also supports:

• Cinematic mode
• Action mode
• Macro video
• Slow-motion video
• Time-lapse
• Dual Capture
• Improved low-light video
• Spatial Audio
• Audio Mix
• Wind noise reduction

For users who regularly create social media videos, the combination of the large folding screen and flexible camera system could be particularly useful.

iPhone Duo Front Camera

The outer display has a 12MP Center Stage camera with an ƒ/2.2 aperture.

It supports features such as:

• Center Stage
• Smart Take
• Photographic Styles
• Night mode
• Portrait photography
• 4K Dolby Vision video
• Ultra-stabilised video
• Dual Capture

The inner display uses an under-display FaceTime camera, allowing Apple to maintain a more uninterrupted large-screen experience.

iPhone Duo Battery Life

The iPhone Duo uses a dual built-in rechargeable lithium-ion battery architecture.

Apple rates battery life at:

• Up to 24 hours of typical use
• Up to 44 hours of video playback using the outer display
• Up to 31 hours of video playback using the inner display
• Up to 37 hours of streamed video using the outer display
• Up to 26 hours of streamed video using the inner display

Battery performance will naturally vary depending on screen usage, network conditions, gaming, camera use and other activities.

iPhone Duo Charging

The iPhone Duo supports fast wired and wireless charging.

With a compatible 60W-capable adapter or higher, Apple says the phone can reach up to 50% charge in around 20 minutes.

With a 35W adapter or higher and MagSafe Charger, it can reach up to 50% in around 30 minutes.

It also supports:

• MagSafe wireless charging up to 25W
• Qi2 wireless charging up to 25W
• USB-C charging

iPhone Duo Storage Options

The iPhone Duo offers four storage capacities:

• 256GB
• 512GB
• 1TB
• 2TB

The 2TB option makes the phone particularly interesting for users who record large amounts of high-resolution video or store extensive photo and media libraries locally.

Connectivity and Wireless Features

The iPhone Duo supports modern wireless connectivity, including:

• 5G
• Wi-Fi 7
• Bluetooth 6
• Thread
• NFC
• Second-generation Ultra Wideband
• Gigabit LTE
• Dual-frequency GPS
• NavIC

It also uses Apple’s N1 wireless networking chip and C2 cellular modem.

For wired connectivity, the USB-C port supports USB 3 speeds of up to 10Gbps and DisplayPort.

Security and Authentication

Unlike Face ID-equipped iPhone models, the iPhone Duo uses Touch ID integrated into the side button.

This allows users to unlock the phone using their fingerprint whether the device is folded or unfolded.

iPhone Duo Software

The iPhone Duo runs iOS 27, which has been adapted for the foldable form factor.

The software is designed to make better use of the larger inner display while maintaining a familiar experience on the outer screen.

Apple Intelligence and Siri AI are also integrated into the experience, bringing AI-powered features to the device.

Apple Pencil Support

The iPhone Duo also supports the Apple Pencil with USB-C.

This can be useful for:

• Taking notes
• Sketching
• Marking documents
• Quick annotations
• Creative work

Apple Pencil support works with both the inner and outer displays.

Is the iPhone Duo Powerful Enough for Gaming?

The A20 Pro chip, 120Hz ProMotion displays and hardware-accelerated ray tracing make the iPhone Duo suitable for demanding mobile games.

The 7.6-inch unfolded display can provide a much larger gaming area than a conventional smartphone.

The larger screen can also be useful for strategy games, cloud gaming, emulation-supported experiences and games with complex controls.

However, the larger unfolded screen also means the phone is heavier and less compact during extended gaming sessions.

iPhone Duo: Key Specifications at a Glance

Who Is the iPhone Duo For?

The iPhone Duo is aimed at users who want something beyond a traditional smartphone.

It makes particular sense for people who:

• Want a large screen without carrying a separate tablet
• Frequently multitask between apps
• Watch a lot of videos
• Play games on a large display
• Take notes or sketch
• Want Apple’s first foldable design
• Need substantial storage
• Want flagship performance in a foldable form factor

For users who mainly want the best possible iPhone camera system, a Pro model may still be more suitable.

Final Verdict

The iPhone Duo specifications make it one of the most distinctive iPhones Apple has produced.

Its combination of a 7.6-inch folding display, 5.4-inch outer display, A20 Pro processor, 48MP Dual Fusion camera system, dual-battery architecture, Touch ID and up to 2TB storage gives it a very different identity from the traditional iPhone lineup.

The biggest reason to consider the iPhone Duo is not simply its processor or camera. It is the combination of a pocketable smartphone experience with a much larger screen when unfolded.

For users who value multitasking, entertainment, gaming and portability, the iPhone Duo could be one of Apple’s most interesting new devices.

FAQs

What processor does the iPhone Duo use?

The iPhone Duo is powered by Apple’s A20 Pro chip with a 6-core CPU, 7-core GPU and Dual 16-core Neural Engine.

How big is the iPhone Duo display?

The iPhone Duo has a 5.4-inch outer display and a 7.6-inch inner folding display.

How many cameras does the iPhone Duo have?

It has a 48MP Dual Fusion rear camera system consisting of a 48MP Main and 48MP Ultra Wide camera.

How long does the iPhone Duo battery last?

Apple rates it for up to 24 hours of typical use, with up to 44 hours of video playback using the outer display and up to 31 hours using the inner display.

Does iPhone Duo support Apple Pencil?

Yes. The iPhone Duo supports Apple Pencil with USB-C on both displays.

How much storage does the iPhone Duo have?

Storage options are 256GB, 512GB, 1TB and 2TB.

Does iPhone Duo have Face ID?

No. The iPhone Duo uses Touch ID integrated into the side button.

Is the iPhone Duo water resistant?

Yes. It has an IP68 rating for splash, water and dust resistance.