iPhone Duo Full Specifications, Features, Price & Review (2026)

Overview: The iPhone Duo is Apple’s first foldable iPhone, combining a large 7.6-inch inner display with a 5.4-inch outer display in a new book-style foldable design. The device is powered by Apple’s A20 Pro chip, featuring a 6-core CPU, 7-core GPU, and Dual 16-core Neural Engine. It also introduces a custom vapor chamber thermal-management system and an iPhone-first dual-battery architecture. The iPhone Duo features a 48MP Dual Fusion camera system, ProMotion displays, Always-On display technology, Apple Intelligence, Siri AI, Touch ID, IP68 water and dust resistance, and USB-C connectivity.

💰 Price

Note: $1,999 is Apple’s official U.S. starting price. Apple has not provided separate storage pricing in the official technical specifications.

📅 Release

⚙️ Full Specifications

🏗️ Design & Build Quality

The iPhone Duo uses a book-style foldable design. Apple describes it as the thinnest iPhone ever when opened.

🖥️ Display

The iPhone Duo has two Super Retina XDR displays. Both displays use the same aspect ratio to provide visual continuity between the folded and unfolded states.

The inner display’s nano-texture finish reduces glare and reflections and also helps minimize the visibility of the fold crease.

🚀 Performance

The A20 Pro is built on a 2nm process and is paired with a custom vapor chamber to maintain performance during demanding workloads.

Apple states that the A20 Pro’s 6-core CPU is up to 20% faster than A19 Pro, while its 7-core GPU is up to 40% faster and more power efficient.

📷 Camera

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

The 48MP Fusion Main also provides an optical-quality 2x Telephoto view, effectively giving the main camera two focal-length options.

📸 Camera Features

🎥 Video Recording

Apple specifically confirms 4K/120fps Dolby Vision recording on the 48MP Fusion Main camera.

🤳 Front Camera

The inner FaceTime camera is located beneath the display so that it remains hidden when not being used.

🔋 Battery & Charging

Apple uses one high-energy battery on each side of the foldable body.

Apple states that iPhone Duo can provide up to 31 hours of video playback using the inner display and can reach up to 50% charge in around 20 minutes with fast wired charging.

🧠 Software & AI

📡 Connectivity

📶 SIM & Security

Apple confirms that iPhone Duo is eSIM-only worldwide and can have two active eSIMs while storing eight or more eSIMs. Touch ID is integrated into the side button.

🔌 Ports & Charging

🧭 Sensors

🛡️ Durability

✏️ Apple Pencil

🎨 Colors

✅ Pros

• Apple’s first foldable iPhone
• Large 7.6-inch inner display
• 5.4-inch outer display
• ProMotion on both displays
• Always-On display
• Up to 3,000 nits outdoor brightness
• Nano-texture inner display
• A20 Pro 2nm chip
• 6-core CPU
• 7-core GPU
• Dual 16-core Neural Engine
• Hardware-accelerated ray tracing
• 48MP Dual Fusion camera system
• 48MP Fusion Main camera
• 48MP Fusion Ultra Wide camera
• Optical-quality 2x Telephoto
• 4K/120fps Dolby Vision video
• Up to 31 hours video playback
• 25W MagSafe charging
• 25W Qi2 charging
• USB 3 up to 10Gb/s
• IP68 water and dust resistance
• Touch ID
• Dual eSIM
• Wi-Fi 7
• Bluetooth 6
• Apple Intelligence
• Siri AI
• Custom vapor chamber
• Dual-battery architecture
• Apple Pencil support coming later in 2026

❌ Cons

• $1,999 starting price
• 241g weight
• Foldable design is heavier than conventional iPhones
• Battery capacity in mAh is not disclosed by Apple
• RAM capacity is not disclosed by Apple
• Storage configurations are not listed in Apple’s technical specifications
• Physical SIM card is not supported
• Apple Pencil support is not available at launch
• Foldable hardware is more complex than a conventional iPhone

🏁 Final Verdict

The iPhone Duo is Apple’s first foldable iPhone and represents a major change in the company’s smartphone design.

Its 7.6-inch inner Super Retina XDR display provides a significantly larger workspace for gaming, entertainment, multitasking, and productivity, while the 5.4-inch outer display allows the device to be used comfortably when folded.

Performance is handled by the 2nm A20 Pro chip with a 6-core CPU, 7-core GPU, and Dual 16-core Neural Engine. Apple also uses a custom vapor chamber and a new chip package to improve sustained performance during gaming, multitasking, and demanding AI workloads.

The camera system is a major strength. The 48MP Dual Fusion system combines a 48MP Fusion Main camera with a 48MP Fusion Ultra Wide camera. The main camera provides an optical-quality 2x Telephoto view, while the system supports up to 10x digital zoom and 48MP macro photography.

For video creators, 4K/120fps Dolby Vision recording, Cinematic mode, Audio Mix, 4K Dolby Vision HDR time-lapse, and advanced stabilization provide a strong professional video package.

Battery performance is also impressive for a foldable device. The dual-battery architecture delivers up to 31 hours of video playback, while fast wired charging can reach 50% in around 20 minutes. MagSafe and Qi2 wireless charging support up to 25W.

The device also introduces a different biometric-security approach from recent iPhones by using Touch ID integrated into the side button instead of Face ID.

Overall, the iPhone Duo is a premium foldable iPhone aimed at users who want a large-screen experience without leaving Apple’s ecosystem. Its combination of a 7.6-inch foldable display, A20 Pro performance, 48MP Dual Fusion camera system, long battery life, advanced AI, and ultra-thin foldable design makes it one of Apple’s most significant iPhone launches.