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- 512 GB
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Overview
iPhone Duo is Apple's first foldable iPhone. It opens to a 7.6-inch Super Retina XDR folding display with a nano-texture finish and closes to a 5.4-inch outer display. This US model (MK1H4LL/A) comes in Night Sky with 512GB of storage. It runs on the A20 Pro chip and the Apple C2 modem with sub-6 GHz and mmWave 5G. The titanium foldable design is rated IP68 and measures 5.2 mm thin when unfolded.
- Foldable titanium design with a 7.6-inch inner and 5.4-inch outer Super Retina XDR OLED display
- A20 Pro chip with a 6-core CPU, 7-core GPU with Neural Accelerators and dual 16-core Neural Engine
- Apple C2 modem with 5G sub-6 GHz and mmWave (4x4 MIMO), plus Wi-Fi 7, Bluetooth 6 and Thread via the Apple N1 chip
- 48MP Dual Fusion camera system with 4K Dolby Vision video at up to 120 fps
- Up to 24 hours of typical use from dual lithium-ion batteries, with 25W MagSafe and Qi2 charging
- IP68 rating (6 meters for up to 30 minutes), Touch ID and dual eSIM
- 512GB of storage in Night Sky
- Unfold to a 7.6-inch workspace for spreadsheets, documents and video, then fold to a 5.4-inch phone that fits a pocket
iPhone Duo is the first foldable iPhone. When it is open, Apple says it is the thinnest iPhone with the largest iPhone display yet: a 7.6-inch Super Retina XDR OLED folding panel at 1878 by 2670 pixels. The panel has a nano-texture finish that reduces glare and an under-display FaceTime camera. When it is closed, the 5.4-inch outer display gives you Dynamic Island, Always-On and ProMotion up to 120Hz. Both displays support Apple Pencil (USB-C). This makes the Duo a strong fit for professionals who review documents, dashboards and video on the move.
The A20 Pro chip has a 6-core CPU, a 7-core GPU with Neural Accelerators and a dual 16-core Neural Engine. It runs iOS 27 with Apple Intelligence. Connectivity comes from the Apple C2 modem, which supports sub-6 GHz and mmWave 5G with 4x4 MIMO. The Apple N1 chip adds Wi-Fi 7, Bluetooth 6 and Thread. The phone uses dual eSIM only and does not accept a physical SIM card. It also offers Emergency SOS, Messages and Find My via satellite.
The rear 48MP Dual Fusion camera system pairs a Fusion Main camera with a 48MP Fusion Ultra Wide camera. Together they give 2x optical-quality telephoto shots and 4K Dolby Vision recording at up to 120 fps. Dual built-in batteries deliver up to 24 hours of typical use. You can reach 50% charge in around 20 minutes with a 60W adapter, sold separately. Wireless charging runs at up to 25W over MagSafe and Qi2.
This configuration is Apple part number MK1H4LL/A, the US model A3447, in Night Sky with 512GB of storage. The box contains the iPhone and a 1 m USB-C charge cable.
Ideal for
- Executives and managers who review documents, dashboards and presentations on a 7.6-inch screen without carrying a tablet
- Field teams that need 5G coverage plus satellite messaging and Emergency SOS outside cell range
- Creators who shoot 4K Dolby Vision video and mark up content with Apple Pencil (USB-C)
- Professionals who present to external displays over USB-C DisplayPort at up to 4K HDR
- Frequent travelers who keep business and personal lines on dual eSIM
Specifications
Chip
- CPU
- 6-core CPU (2 super cores, 4 efficiency cores)
- Gpu
- 7-core GPU with Neural Accelerators
- Chip
- A20 Pro chip
- Ray Tracing
- Hardware-accelerated ray tracing
- Neural Engine
- Dual 16-core Neural Engine
Siri
- Features
- Hands-free voice activation or Type to Siri, powered by Apple Intelligence
Camera
- Macro
- 48MP macro photography
- System
- 48MP Dual Fusion camera system
- Panorama
- Panorama (up to 63MP)
- Telephoto
- 52 mm, ƒ/1.6, sensor-shift optical image stabilization, Hybrid Focus Pixels
- Fusion Main
- 26 mm, ƒ/1.6, sensor-shift optical image stabilization, Hybrid Focus Pixels, super-high-resolution photos (24MP and 48MP)
- Digital Zoom
- Digital zoom up to 10x
- Optical Zoom
- 2x optical-quality zoom in, 2x optical zoom out; 4x optical-quality zoom range
- Image Formats
- HEIF and JPEG
- Photo Features
- Smart Take, Duo Preview, Photographic Styles 3, Smart HDR 5, Deep Fusion, Night mode, Portrait Lighting and more
- Fusion Ultra Wide
- 13 mm, ƒ/2.2, 120° field of view, Hybrid Focus Pixels, super-high-resolution photos (24MP and 48MP)
Finish
- Back
- Ceramic Shield back
- Front
- Ceramic Shield 2 front
- Design
- Titanium foldable design
- Available Colors
- Night Sky, Star White
Package
- Shipping Weight
- 0.98 lb
Privacy
- Details
- Secure authentication, App Tracking permission, end-to-end encrypted iMessage and FaceTime
Sensors
- Sensors
- Touch ID, barometer, HDR 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 contrast ratio (typical)
- Max Brightness
- 1000 nits max brightness (typical)
- Display Features
- Dynamic Island; Always-On; ProMotion up to 120Hz; HDR; True Tone; Wide color (P3); Haptic Touch
- Inner Resolution
- 1878-by-2670-pixel resolution at 430 ppi
- Outer Resolution
- 1398-by-2034-pixel resolution at 460 ppi
- Minimum Brightness
- 1 nit minimum brightness
- Peak Brightness Hdr
- 1600 nits peak brightness (HDR)
- Rectangular Diagonals
- 7.58 and 5.36 inches measured as a standard rectangle (actual viewable area is less)
- Multi Language Display
- Display of multiple languages and characters simultaneously
- Peak Brightness Outdoor
- 3000 nits peak brightness (outdoor)
Location
- GNSS
- Precision dual-frequency GPS (GPS, GLONASS, Galileo, QZSS, BeiDou, and NavIC)
- Other Location
- Digital compass; Wi-Fi; Cellular; iBeacon microlocation
SIM Card
- SIM
- Dual eSIM (two active eSIMs; stores eight or more)
- Physical SIM
- eSIM only; not compatible with physical SIM cards
Touch ID
- Sensor
- Fingerprint sensor built into the side button
Apple Pay
- Features
- Touch ID payments, Apple Cash, Express Transit
Languages
- Supported Languages
- English, Chinese, French, German, Spanish, Japanese, Korean and 30+ more
Apple Card
- Details
- Apple Card support in the Wallet app
IN The Box
- Contents
- iPhone with iOS 27; USB-C Charge Cable (1 m)
Front Camera
- Inner Video
- 1080p video recording at 30 or 60 fps; QuickTake at 1080p 30/60 fps
- Inner Camera
- Under-display FaceTime camera, ƒ/1.8 aperture
- Outer Camera
- 12MP Center Stage camera, ƒ/2.2 aperture
- Outer Slo MO
- Slo-mo 1080p at 120 fps
- Inner Features
- Center Stage for video calls, ultra-stabilized video, Animoji and Memoji in FaceTime and more
- Outer Video 4k
- 4K Dolby Vision at 24, 25, 30 or 60 fps
- Outer Quicktake
- QuickTake up to 4K at 60 fps in Dolby Vision
- Outer Video 1080p
- 1080p Dolby Vision at 25, 30 or 60 fps
- Outer Cinematic Mode
- Cinematic mode up to 4K Dolby Vision at 30 fps
- Outer Photo Features
- Retina Flash, Smart Take, Kid Cue, Center Stage, Smart HDR 5, Night mode and more
- Outer Video Features
- Ultra-stabilized video, Dual Capture, Center Stage, time-lapse, Spatial Audio recording and more
Hearing Aids
- Rating
- Hearing Aid Compatible
Accessibility
- Features
- VoiceOver, Voice Control, Eye Tracking, Live Captions, Personal Voice and more
Audio Calling
- Features
- FaceTime audio, VoLTE, Wi-Fi calling, Voice Isolation
Environmental
- Altitude
- Tested up to 10,000 feet (3000 m)
- Relative Humidity
- 5% to 95% noncondensing
- Operating Temperature
- 32° to 95° F (0° to 35° C)
- Nonoperating Temperature
- −4° to 113° F (−20° to 45° C)
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 and more
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
- Hdr
- HDR with Dolby Vision, HDR10+/HDR10 and HLG
- Airplay
- Up to 4K HDR AirPlay for mirroring, photos and video out
- Formats
- HEVC, H.264 and AV1
- Video Out
- Up to 4K HDR through DisplayPort over USB-C or USB-C Digital AV Adapter (A2119, sold separately)
Size And Weight
- Folded Depth
- 0.44 inch (11.3 mm)
- Folded Width
- 3.31 inches (84.1 mm)
- Folded Height
- 4.64 inches (117.8 mm)
- Folded Weight
- 8.96 ounces (254 grams)
- Unfolded Depth
- 0.21 inch (5.2 mm)
- Unfolded Width
- 6.48 inches (164.6 mm)
- Unfolded Height
- 4.64 inches (117.8 mm)
- Unfolded Weight
- 8.96 ounces (254 grams)
Video Recording
- Slo MO
- Slo-mo 1080p up to 240 fps and 4K Dolby Vision up to 120 fps
- Video 4k
- 4K Dolby Vision at 24, 25, 30, 60, 100 or 120 fps (100/120 fps on Fusion Main)
- Quicktake
- QuickTake video up to 4K Dolby Vision at 60 fps
- Time Lapse
- Time-lapse with stabilization up to 4K Dolby Vision; Night mode Time-lapse
- Video 720p
- 720p Dolby Vision at 30 fps
- Action Mode
- Action mode up to 2.8K Dolby Vision at 60 fps
- Video 1080p
- 1080p Dolby Vision at 25, 30, 60 or 120 fps (120 fps on Fusion Main)
- Digital Zoom
- Digital zoom up to 6x
- Dual Capture
- Dual Capture up to 4K Dolby Vision at 30 fps
- Stabilization
- Sensor-shift OIS (Fusion Main); Cinematic video stabilization (4K, 1080p, 720p)
- Video Formats
- HEVC and H.264
- Cinematic Mode
- Cinematic mode up to 4K Dolby Vision at 60 fps
- Other Features
- Duo Preview, smart focus tracking, macro video, audio zoom, continuous autofocus and more
- Audio Recording
- Spatial Audio and stereo recording; Wind noise reduction; Audio Mix
- Still While Recording
- Take 8MP still photos while recording 4K video
Operating System
- OS
- iOS 27
Power And Battery
- Typical Use
- Up to 24 hours typical use
- Battery Type
- Dual built-in rechargeable lithium-ion batteries
- Fast Charge Wired
- Up to 50% in around 20 minutes with 60W-capable adapter or higher and USB-C cable (adapter sold separately)
- Fast Charge Magsafe
- Up to 50% in around 30 minutes with 35W adapter or higher and MagSafe Charger (both sold separately)
- Streamed Video Inner
- Up to 26 hours streamed video (inner display)
- Streamed Video Outer
- Up to 37 hours streamed video (outer display)
- Video Playback Inner
- Up to 31 hours video playback (inner display)
- Video Playback Outer
- Up to 44 hours video playback (outer display)
Apple Intelligence
- Details
- Apple Intelligence and Siri AI
This Configuration
- UPC
- 195951405476
- Brand
- Apple
- Color
- Night Sky
- Market
- US model (LL/A)
- Capacity
- 512GB
- Model Family
- iPhone Duo
- Apple Part Number
- MK1H4LL/A
- Configuration Name
- iPhone Duo 512GB Night Sky
System Requirements
- Requirements
- Apple Account, internet access, macOS 10.13 or later or Windows 10 or later
Cellular And Wireless
- LTE
- Gigabit LTE with 4x4 MIMO
- NFC
- NFC with reader mode; Express Cards with power reserve
- Wi-Fi
- Wi-Fi 7 (802.11be) with 2x2 MIMO
- Modem
- Apple C2 cellular modem
- Thread
- Thread networking technology
- Fdd LTE
- FDD-LTE bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 29, 30, 32, 66, 71, 106
- NR MIMO
- 5G (sub-6 GHz and mmWave) with 4x4 MIMO
- Tdd LTE
- TDD-LTE bands 34, 38, 39, 40, 41, 42, 48, 53
- Gsm Edge
- GSM/EDGE 850, 900, 1800, 1900 MHz
- Bluetooth
- Bluetooth 6
- Fdd 5G NR
- FDD-5G NR bands n1, n2, n3, n5, n7, n8, n12, n14, n20, n25, n26, n28, n29, n30, n66, n70, n71, n75
- Tdd 5G NR
- TDD-5G NR bands n38, n40, n41, n48, n53, n77, n78, n79
- Umts Hspa
- UMTS/HSPA+ 850, 900, 1700/2100, 1900, 2100 MHz
- Mmwave 5G NR
- 5G NR mmWave bands n258, n260, n261
- Model Number
- Model A3447
- Wireless Chip
- Apple N1 wireless networking chip
- Ultra Wideband
- Apple second-generation Ultra Wideband chip
Charging And Expansion
- Connector
- USB-C connector
- USB C Support
- Charging; DisplayPort; USB 3 (up to 10Gb/s)
Water And Dust Resistance
- Rating
- Rated 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
- Other
- Magnet array; Alignment magnet; Accessory Identification NFC; Magnetometer
- Magsafe
- MagSafe wireless charging up to 25W
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 storage for eight or more, and it is not compatible with physical SIM cards.
What is in the box?
The box contains the iPhone Duo with iOS 27 and a 1 m USB-C Charge Cable. Power adapters are sold separately.
Does the iPhone Duo work with Apple Pencil?
Yes. The iPhone Duo displays support Apple Pencil (USB-C).
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, to a maximum depth of 6 meters for up to 30 minutes.
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