5G
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- 2 TB
$3,582.88
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Overview
Apple iPhone Duo is the first foldable iPhone. A 7.6-inch Super Retina XDR inner display opens from a 5.4-inch outer display, in a titanium design just 5.2 mm thin when unfolded. This 2TB Night Sky US configuration (MK1R4LL/A, model A3447) runs iOS 27 on the A20 Pro chip. It connects over 5G sub-6 GHz and mmWave through the Apple C2 modem and uses dual eSIM for flexible line management.
- First foldable iPhone: 7.6-inch inner and 5.4-inch outer Super Retina XDR OLED displays with ProMotion up to 120Hz
- Titanium foldable design, 5.2 mm thin unfolded and 11.3 mm folded, with Ceramic Shield 2 front and IP68 rating
- A20 Pro chip with 6-core CPU, 7-core GPU with Neural Accelerators and dual 16-core Neural Engine
- 48MP Dual Fusion camera system with 12MP optical-quality 2x Telephoto and 4K Dolby Vision video up to 120 fps
- Apple C2 modem with 5G sub-6 GHz and mmWave (4x4 MIMO), plus Apple N1 chip with Wi-Fi 7, Bluetooth 6 and Thread
- Dual eSIM with two active lines; 2TB storage in Night Sky
- Review documents, spreadsheets and dashboards on a 7.6-inch inner display, then fold it down to a 5.4-inch outer screen for one-handed calls and messages
- Store large files, offline maps and 4K Dolby Vision footage on the device with 2TB of capacity
Apple iPhone Duo folds a tablet-class 7.6-inch display into a pocketable phone. Apple describes it as the thinnest iPhone with the largest iPhone display ever, 50 percent larger than iPhone 18 Pro Max. Closed, it gives you a 5.4-inch outer display with more than 90 percent of the screen area of iPhone 18 Pro. The inner OLED panel uses 10 ultrathin layers with a nano-texture finish that cuts glare, and the under-display FaceTime camera stays hidden until you need it. Both displays support ProMotion up to 120Hz, up to 3000 nits peak outdoor brightness and Apple Pencil (USB-C). This configuration is 2TB in Night Sky, the largest of the four capacities Apple offers.
The A20 Pro chip has a 6-core CPU, a 7-core GPU with Neural Accelerators and a dual 16-core Neural Engine, and it runs Apple Intelligence and Siri AI on iOS 27. The 48MP Dual Fusion camera system pairs a 48MP Fusion Main camera, which also provides a 12MP optical-quality 2x Telephoto, with a 48MP Fusion Ultra Wide. It records 4K Dolby Vision video at up to 120 fps.
For mobile professionals, the Apple C2 modem delivers 5G sub-6 GHz and mmWave with 4x4 MIMO, plus Gigabit LTE. The Apple N1 chip adds Wi-Fi 7, Bluetooth 6 and Thread. The phone uses dual eSIM only, with two active lines, and does not accept physical SIM cards. Apple rates battery life at up to 24 hours of typical use, and the IP68 rating covers depths up to 6 meters for 30 minutes. Satellite features include Emergency SOS, Messages, Roadside Assistance and Find My.
Ideal for
- Executives and managers reviewing documents, dashboards and presentations on the 7.6-inch inner display while travelling
- Field-operations leads using offline maps, site photos and 4K video with 2TB of on-device storage
- Professionals running separate work and personal lines on dual active eSIMs
- Remote and off-grid work that benefits from Emergency SOS, Messages and Find My via satellite
- Mobile note-taking and document markup with Apple Pencil (USB-C)
Specifications
Chip
- CPU
- 6-core CPU with 2 super cores and 4 efficiency cores
- Gpu
- 7-core GPU with Neural Accelerators
- Processor
- A20 Pro chip
- Ray Tracing
- Hardware-accelerated ray tracing
- Neural Engine
- Dual 16-core Neural Engine
Camera
- Macro
- 48MP macro photography
- System
- 48MP Dual Fusion camera system
- Features
- Smart Take; Duo Preview; Photographic Styles 3; Smart focus tracking; Customizable default lens; Sapphire crystal lens cover; True Tone flash; Photonic Engine; Deep Fusion; Smart HDR 5; Next-generation portraits; Portrait Lighting (six effects); Night mode; Wide color capture; Lens correction; Advanced red-eye correction; Auto image stabilization; Burst mode; Photo geotagging
- Panorama
- Up to 63MP
- Telephoto
- 52 mm, ƒ/1.6, sensor-shift OIS, Hybrid Focus Pixels
- Fusion Main
- 26 mm, ƒ/1.6, sensor-shift OIS, Hybrid Focus Pixels, 24MP and 48MP photos
- Digital Zoom
- Up to 10x
- Optical Zoom
- 2x in, 2x out; 4x optical-quality zoom range
- Image Formats
- HEIF and JPEG
- Fusion Ultra Wide
- 13 mm, ƒ/2.2, 120° field of view, Hybrid Focus Pixels, 24MP and 48MP photos
Finish
- Back
- Ceramic Shield back
- Front
- Ceramic Shield 2 front
- Design
- Titanium foldable design
- Available Colors
- Night Sky, Star White
General
- MPN
- MK1R4LL/A
- UPC
- 195951405513
- Brand
- Apple
- Color
- Night Sky
- Model
- iPhone Duo
- Region
- US configuration
- Capacity
- 2TB
- Configuration
- iPhone Duo 2TB Night Sky
- Shipping Weight
- 0.98 lb
Package
- IN The Box
- iPhone Duo with iOS 27; USB-C Charge Cable (1 m)
Sensors
- Sensors
- Touch ID; Barometer; High dynamic range gyro; High-g accelerometer; Proximity sensor; Four ambient light sensors
Capacity
- Available Capacities
- 256GB; 512GB; 1TB; 2TB
Displays
- Coatings
- Fingerprint-resistant oleophobic coating; Anti-reflective coating
- Apple Pencil
- Supports Apple Pencil (USB-C)
- Inner Finish
- Nano-texture finish; Wide-angle OLEDs
- Inner Display
- 7.6-inch (diagonal) Super Retina XDR all-screen OLED folding display
- Outer Display
- 5.4-inch (diagonal) Super Retina XDR all-screen OLED display
- Contrast Ratio
- 2,000,000:1 (typical)
- Max Brightness
- 1000 nits max (typical)
- Display Features
- Dynamic Island; Always-On display; ProMotion up to 120Hz; HDR; True Tone; Wide color (P3); Haptic Touch
- Inner Resolution
- 1878-by-2670 pixels at 430 ppi
- Outer Resolution
- 1398-by-2034 pixels at 460 ppi
- Minimum Brightness
- 1 nit minimum
- Peak Brightness Hdr
- 1600 nits peak (HDR)
- Rectangular Diagonals
- 7.58 in and 5.36 in measured as standard rectangles (actual viewable area is less)
- Multi Language Display
- Display of multiple languages and characters simultaneously
- Peak Brightness Outdoor
- 3000 nits peak (outdoor)
Location
- GNSS
- Precision dual-frequency GPS (GPS, GLONASS, Galileo, QZSS, BeiDou, NavIC)
- Other
- Digital compass; Wi-Fi; Cellular; iBeacon microlocation
SIM Card
- SIM
- two active, stores eight or more
- Physical SIM
- Not compatible with physical SIM cards
Software
- Siri
- Hands-free "Siri"/"Hey Siri"; Type to Siri; powered by Apple Intelligence
- Privacy
- Secure authentication; App Tracking permission; End-to-end encrypted iMessage and FaceTime
- Apple Pay
- Apple Pay with Touch ID; Apple Cash; Pay on Mac; Express Transit
- Apple Card
- Apple Card support in the Wallet app
- Operating System
- iOS 27
- Apple Intelligence
- Apple Intelligence powers Siri AI, a new, more personal and conversational Siri
Touch ID
- Sensor
- Touch ID in side button
Languages
- Supported Languages
- English, Chinese, French, German, Italian, Japanese, Korean, Spanish, Arabic, Bulgarian, Catalan, Croatian, Czech, Danish, Dutch, Finnish, Greek, Hebrew, Hindi, Hungarian, Indonesian, Kazakh, Malay, Norwegian, Polish, Portuguese, Romanian, Russian, Slovak, Swedish, Thai, Turkish, Ukrainian, Vietnamese
Front Camera
- Outer Video
- 4K Dolby Vision up to 60 fps; 1080p Dolby Vision up to 60 fps; Cinematic mode up to 4K at 30 fps; Slo-mo 1080p at 120 fps; QuickTake up to 4K at 60 fps; Spatial Audio recording
- Inner Camera
- under-display FaceTime camera, ƒ/1.8, Center Stage for video calls
- Outer Camera
- 12MP Center Stage camera, ƒ/2.2, Retina Flash
- Inner Features
- 1080p at 30/60 fps; Center Stage; Ultra-stabilized video; Animoji and Memoji in FaceTime; QuickTake 1080p; Spatial Audio recording
- Outer Features
- Smart Take; Kid Cue; Photographic Styles 3; Center Stage for photos and video calls; Ultra-stabilized video; Dual Capture; Photonic Engine; Deep Fusion; Smart HDR 5; Portraits; Portrait Lighting; Animoji and Memoji; Night mode; Burst mode
Accessibility
- Features
- Assistive Access; VoiceOver; Zoom; Magnifier; Voice Control; Switch Control; AssistiveTouch; Eye Tracking; RTT/TTY; Closed Captions; Live Captions; Personal Voice; Live Speech; Type to Siri; Vocal Shortcuts; Spoken Content
- Hearing Aid Rating
- Hearing Aid Compatible
Audio Calling
- Features
- FaceTime audio; VoLTE; Wi-Fi calling; SharePlay; Screen sharing; Spatial Audio; Voice Isolation and Wide Spectrum
Environmental
- Altitude
- Tested up to 10,000 ft (3000 m)
- Temperature
- 32° to 95° F (0° to 35° C); −4° to 113° F (−20° to 45° C)
- Relative Humidity
- 5% to 95% noncondensing
Peace OF Mind
- Safety Features
- Emergency SOS, Roadside Assistance, Messages and Find My via satellite; Crash Detection
Video Calling
- Features
- FaceTime HD (1080p) over 5G or Wi-Fi; Center Stage; Duo FaceTime; SharePlay; Screen sharing; Portrait mode; Spatial Audio; Voice Isolation and Wide Spectrum; Rear camera zoom
Audio Playback
- Formats
- AAC, APAC, MP3, Apple Lossless, FLAC, Dolby Digital, Dolby Digital Plus, Dolby Atmos
- Features
- Spatial Audio playback; User-configurable maximum volume limit
Video Playback
- Airplay
- Up to 4K HDR AirPlay for mirroring, photos and video out
- Formats
- HEVC, H.264, AV1; Dolby Vision, HDR10+/HDR10, HLG
- Video Out
- Up to 4K HDR via DisplayPort over USB-C or USB-C Digital AV Adapter (A2119, sold separately)
Size And Weight
- Folded Depth
- 0.44 in (11.3 mm)
- Folded Width
- 3.31 in (84.1 mm)
- Folded Height
- 4.64 in (117.8 mm)
- Folded Weight
- 8.96 oz (254 g)
- Unfolded Depth
- 0.21 in (5.2 mm)
- Unfolded Width
- 6.48 in (164.6 mm)
- Unfolded Height
- 4.64 in (117.8 mm)
- Unfolded Weight
- 8.96 oz (254 g)
Video Recording
- Slo MO
- 1080p up to 240 fps; 4K Dolby Vision up to 120 fps (Fusion Main)
- Features
- Duo Preview; Smart focus tracking; Improved low-light 1080p; Macro video incl. slo-mo and time-lapse; Stabilized time-lapse up to 4K Dolby Vision; Night mode Time-lapse; Sensor-shift OIS (Fusion Main); Audio zoom; True Tone flash; Cinematic stabilization; Continuous autofocus; Playback zoom; Spatial Audio and stereo recording; Wind noise reduction; Audio Mix
- Video 4k
- 4K Dolby Vision at 24/25/30/60 fps; 100 and 120 fps (Fusion Main)
- Quicktake
- QuickTake up to 4K Dolby Vision at 60 fps
- Video 720p
- 720p Dolby Vision at 30 fps
- Action Mode
- Up to 2.8K Dolby Vision at 60 fps
- Video 1080p
- 1080p Dolby Vision at 25/30/60 fps; 120 fps (Fusion Main)
- Digital Zoom
- Up to 6x
- Dual Capture
- Up to 4K Dolby Vision at 30 fps
- Video Formats
- HEVC and H.264
- Cinematic Mode
- Up to 4K Dolby Vision at 60 fps; effects from video (Fusion Main)
- Still While Recording
- 8MP stills while recording 4K video
Power And Battery
- Battery
- Dual built-in rechargeable lithium-ion batteries
- Typical Use
- Up to 24 hours
- Fast Charge Wired
- Up to 50% in around 20 min with 60W-capable adapter or higher (sold separately) and USB-C cable
- Fast Charge Magsafe
- Up to 50% in around 30 min with 35W adapter or higher and MagSafe Charger (both sold separately)
- Streamed Video Inner
- Up to 26 hours streamed (inner display)
- Streamed Video Outer
- Up to 37 hours streamed (outer display)
- Video Playback Inner
- Up to 31 hours (inner display)
- Video Playback Outer
- Up to 44 hours (outer display)
System Requirements
- Requirements
- Apple Account; Internet access; macOS 10.15+ (Finder), macOS 10.13–10.14.6 (iTunes 12.8+), or Windows 10+ (iTunes 12.12.10+)
Cellular And Wireless
- 5G
- 5G (sub-6 GHz and mmWave) with 4x4 MIMO
- LTE
- Gigabit LTE with 4x4 MIMO
- NFC
- NFC with reader mode; Express Cards with power reserve
- Wi-Fi
- Wi-Fi 7 (802.11be), 2x2 MIMO
- Modem
- Apple C2 cellular modem
- Thread
- Thread networking technology
- Fdd LTE
- 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 29, 30, 32, 66, 71, 106
- Tdd LTE
- 34, 38, 39, 40, 41, 42, 48, 53
- Gsm Edge
- 850, 900, 1800, 1900 MHz
- Bluetooth
- Bluetooth 6
- Fdd 5G NR
- n1, n2, n3, n5, n7, n8, n12, n14, n20, n25, n26, n28, n29, n30, n66, n70, n71, n75
- Tdd 5G NR
- n38, n40, n41, n48, n53, n77, n78, n79
- Umts Hspa
- 850, 900, 1700/2100, 1900, 2100 MHz
- 5G NR Mmwave
- n258, n260, n261
- Model Number
- Model A3447
- Wireless Chip
- Apple N1 wireless networking chip
- Ultra Wideband
- Second-generation Ultra Wideband chip
Charging And Expansion
- Connector
- USB-C with charging, DisplayPort and USB 3
- USB Speed
- USB 3 (up to 10Gb/s)
- Displayport
- DisplayPort over USB-C
Water And Dust Resistance
- Rating
- IP68 (maximum depth of 6 meters up to 30 minutes) under IEC standard 60529
Magsafe And Wireless Charging
- Qi2
- Qi2 wireless charging up to 25W
- Magsafe
- MagSafe wireless charging up to 25W
- Features
- Magnet array; Alignment magnet; Accessory Identification NFC; Magnetometer
External Buttons And Connectors
- Controls
- Exposure, Depth, Zoom, Cameras, Styles, Tone
Questions buyers ask
Does the iPhone Duo accept a physical SIM card?
No. iPhone Duo uses dual eSIM with two active eSIMs and can store eight or more. It is not compatible with physical SIM cards.
Does this model support 5G mmWave?
Yes. Model A3447 supports 5G sub-6 GHz and mmWave (bands n258, n260 and n261) with 4x4 MIMO through the Apple C2 modem, plus Gigabit LTE.
What is in the box?
The iPhone Duo with iOS 27 and a 1 m USB-C Charge Cable. A power adapter is not included. Apple quotes up to 50% charge in around 20 minutes with a 60W-capable adapter, sold separately.
How long does the battery last?
Apple rates it at up to 24 hours of typical use. Video playback runs up to 44 hours on the outer display or up to 31 hours on the inner display.
Is the iPhone Duo water resistant?
Yes. It is rated IP68 under IEC standard 60529, for a maximum depth of 6 meters for up to 30 minutes.
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