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Apple iPhone Duo 512GB Star White Foldable 5G Smartphone (MK1G4LL/A)

5GMPN MK1G4LL/A
  • 512 GB
$2,462.88

Backordered · ships as soon as it arrives

Color · White
BlackWhite
Storage · 512 GB
1 TB+$4482 TB+$1,120256 GB−$224512 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 and closes to a 5.4-inch outer display, in a titanium body 5.2 mm thin when unfolded. This US configuration (MK1G4LL/A) has 512GB of storage in Star White. It is built around the A20 Pro chip and the Apple C2 modem, with 5G sub-6 GHz and mmWave, Wi-Fi 7 and dual eSIM.

  • First foldable iPhone: 7.6-inch Super Retina XDR inner folding display and 5.4-inch outer display, both with ProMotion up to 120Hz
  • 512GB storage in the Star White finish
  • A20 Pro chip with 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) and Gigabit LTE
  • 48MP Dual Fusion camera system with 4K Dolby Vision video at up to 120 fps (Fusion Main)
  • Titanium foldable design, IP68 rated to 6 meters for up to 30 minutes
  • Dual eSIM, Wi-Fi 7, Bluetooth 6, satellite features and 25W MagSafe and Qi2 charging
  • Keep large project files, offline maps and long 4K recordings on the device with 512GB of storage

iPhone Duo brings a foldable design to iPhone for the first time. Unfolded, the 7.6-inch inner display is Apple's largest and thinnest iPhone screen, rated 50 percent larger than iPhone 18 Pro Max. Folded, the 5.4-inch outer display offers more than 90 percent of the screen area of iPhone 18 Pro. MK1G4LL/A is the US-market 512GB model in Star White. The larger capacity suits professionals who keep offline files, large apps and 4K Dolby Vision footage on the device.

Both Super Retina XDR OLED displays run ProMotion up to 120Hz and reach up to 3000 nits peak brightness outdoors. The inner panel has a glare-reducing nano-texture finish and an under-display FaceTime camera, and it supports Apple Pencil (USB-C). The A20 Pro chip combines a 6-core CPU, a 7-core GPU with Neural Accelerators and a dual 16-core Neural Engine for Apple Intelligence. The phone is rated IP68 to 6 meters for up to 30 minutes and has a Ceramic Shield 2 front.

The Apple C2 modem handles 5G sub-6 GHz and mmWave with 4x4 MIMO, plus Gigabit LTE. The Apple N1 chip provides Wi-Fi 7, Bluetooth 6 and Thread. Dual eSIM keeps two lines active at once, stores eight or more eSIMs and does not accept physical SIM cards. Satellite support covers Emergency SOS, Messages, Roadside Assistance and Find My.

Dual lithium-ion batteries deliver up to 24 hours of typical use. The phone charges to 50 percent in around 20 minutes with a 60W or higher USB-C adapter, available separately, and supports 25W MagSafe and Qi2 wireless charging. The USB-C port supports DisplayPort output up to 4K HDR and USB 3 at up to 10Gb/s. The box includes the iPhone with iOS 27 and a 1 m USB-C Charge Cable.

Ideal for

  • Professionals who store large files, offline data and long video recordings on the device
  • Executives who review and mark up documents with Apple Pencil (USB-C) on the 7.6-inch inner display
  • Field teams that need 5G mmWave and sub-6 GHz coverage with satellite messaging and Emergency SOS as a fallback
  • Frequent travellers managing work and personal lines on dual eSIM
  • Presenters connecting to monitors at up to 4K HDR over USB-C DisplayPort

Specifications

Chip

CPU
6-core CPU (2 super cores, 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

Siri

Features
Hands-free "Siri" / "Hey Siri"; Type to Siri; powered by Apple Intelligence

Camera

Zoom
2x optical-quality zoom in, 2x optical zoom out; 4x optical-quality zoom range; digital zoom up to 10x
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
Panorama (up to 63MP)
Fusion Main
26 mm, ƒ/1.6, sensor-shift optical image stabilization, Hybrid Focus Pixels, super-high-resolution photos (24MP and 48MP)
Telephoto 2x
12MP optical-quality 2x Telephoto: 52 mm, ƒ/1.6, sensor-shift optical image stabilization, Hybrid Focus Pixels
Image Formats
HEIF and JPEG
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 fingerprint sensor; 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)
Contrast Ratio
2,000,000:1 contrast ratio (typical)
Display Features
Dynamic Island; Always-On display; ProMotion up to 120Hz; HDR display; True Tone; Wide color (P3); Haptic Touch
Inner Display Size
7.6-inch (diagonal)
Inner Display Type
Super Retina XDR all-screen OLED folding display
Minimum Brightness
1 nit minimum brightness
Outer Display Size
5.4-inch (diagonal)
Outer Display Type
Super Retina XDR all-screen OLED display
Peak Brightness Hdr
1600 nits peak brightness (HDR)
Inner Display Finish
Nano-texture finish; Wide-angle OLEDs
Multilingual Display
Multiple languages and characters displayed simultaneously
Max Brightness Typical
1000 nits max brightness (typical)
Peak Brightness Outdoor
3000 nits peak brightness (outdoor)
Rectangular Measurement
7.58 and 5.36 inches diagonally when measured as standard rectangles (actual viewable area is less)
Inner Display Resolution
1878-by-2670-pixel resolution at 430 ppi
Outer Display Resolution
1398-by-2034-pixel resolution at 460 ppi

Location

GNSS
Precision dual-frequency GPS (GPS, GLONASS, Galileo, QZSS, BeiDou, and NavIC)
Other
Digital compass; Wi-Fi; Cellular; iBeacon microlocation

SIM Card

SIM
Dual eSIM (two active eSIMs; stores eight or more eSIMs)
Physical SIM
Not compatible with physical SIM cards

Touch ID

Fingerprint Sensor
Fingerprint sensor built into the side button

Apple Pay

Features
Touch ID payments in stores, apps and web; Apple Cash in Messages; Mac purchase completion; Express Transit

Languages

Supported
English, Chinese, French, German, Italian, Japanese, Korean, Spanish, Arabic and 26 more languages

Apple Card

Details
Apple Card: 3% / 2% / 1% Daily Cash; managed in Wallet; titanium physical card; Family Sharing for up to five people (13+)

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 video at 1080p 30 and 60 fps
Outer Video
4K Dolby Vision at 24/25/30/60 fps; 1080p Dolby Vision at 25/30/60 fps; Cinematic mode up to 4K Dolby Vision at 30 fps; Slo-mo 1080p at 120 fps; QuickTake up to 4K 60 fps Dolby Vision
Inner Camera
Under-display FaceTime camera, ƒ/1.8 aperture
Outer Camera
12MP Center Stage camera, ƒ/2.2 aperture
Inner Features
Center Stage for video calls; Tap to zoom and rotate; Ultra-stabilized video; Animoji and Memoji in FaceTime; Wide color capture; Lens correction; Auto image stabilization; Spatial Audio and stereo recording; Wind noise reduction; Audio Mix
Outer Features
Retina Flash; 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; Stabilized time-lapse; Night mode Time-lapse; Spatial Audio; Wind noise reduction; Audio Mix

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

Audio Calling

Features
FaceTime audio; VoLTE; Wi-Fi calling; SharePlay; Screen sharing; Spatial Audio; Voice Isolation and Wide Spectrum microphone modes

Peace OF Mind

Safety Features
Emergency SOS via satellite; Crash Detection; Roadside Assistance via satellite; Messages via satellite; Find My via satellite

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

Hdr
HDR with Dolby Vision, HDR10+/HDR10, and HLG
Airplay
Up to 4K HDR AirPlay for mirroring, photos and video out to Apple TV (2nd gen or later) or AirPlay-enabled smart TV
Formats
HEVC, H.264, AV1
Video Out
Up to 4K HDR through native 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; 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 video 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, 100 fps (Fusion Main) or 120 fps (Fusion Main)
Quicktake
QuickTake video up to 4K Dolby Vision at 60 fps
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 (Fusion Main)
Digital Zoom
Digital zoom up to 6x
Dual Capture
Dual Capture up to 4K Dolby Vision at 30 fps
Video Formats
HEVC and H.264
Cinematic Mode
Cinematic mode up to 4K Dolby Vision at 60 fps; Cinematic mode effects from video (Fusion Main)
Stills 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
Video Playback
Up to 44 hours (outer display); up to 31 hours (inner display)
Fast Charge Wired
Up to 50% in around 20 minutes with a 60W-capable or higher adapter (available separately) and USB-C charging cable
Fast Charge Magsafe
Up to 50% in around 30 minutes with a 35W or higher adapter and MagSafe Charger (both available separately)
Video Playback Streamed
Up to 37 hours (outer display); up to 26 hours (inner display)

This Configuration

MPN
MK1G4LL/A
UPC
195951405469
Brand
Apple
Color
Star White
Market
United States (LL/A)
Capacity
512GB
Listing Name
iPhone Duo 512GB Star White
Model Family
iPhone Duo

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) with 2x2 MIMO
Model
Model A3447
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
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
5G NR Mmwave
5G NR mmWave Bands n258, n260, n261
Wireless Chip
Apple N1 wireless networking chip
Cellular Modem
Apple C2 cellular modem
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)

Rating For Hearing Aids

Rating
Hearing Aid Compatible

Environmental Requirements

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)

Splash Water 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
Other
Magnet array; Alignment magnet; Accessory Identification NFC; Magnetometer
Magsafe
MagSafe wireless charging up to 25W

Apple Intelligence And Siri AI

Details
Apple Intelligence with Siri AI

External Buttons And Connectors

Controls
Exposure, Depth, Zoom, Cameras, Styles, Tone

Questions buyers ask

What storage and color is MK1G4LL/A?

MK1G4LL/A is the US-market iPhone Duo with 512GB of storage in Star White.

Does iPhone Duo work with Apple Pencil?

Yes. Apple lists support for Apple Pencil (USB-C) on the iPhone Duo displays.

Is iPhone Duo water resistant?

iPhone Duo is rated IP68 under IEC standard 60529. The rating covers a maximum depth of 6 meters for up to 30 minutes.

Can I use a physical SIM card?

No. iPhone Duo uses dual eSIM, with two active lines and storage for eight or more eSIMs. It is not compatible with physical SIM cards.

How fast does it charge?

It reaches up to 50 percent in around 20 minutes with a 60W or higher adapter and a USB-C cable. With a 35W or higher adapter and a MagSafe Charger, it reaches 50 percent in around 30 minutes. Adapters are available separately.

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