Specifications

iPhone Duo specs: dimensions, weight, displays and cameras

Everything Apple published on 9 September 2026 for the iPhone Duo, in English and in one place: dimensions and weight, both displays, chip, cameras, battery and what it leaves out (Face ID, telephoto, SIM tray).

Dutch version: iPhone Duo specificaties.

9:41

7.6"

inner display

5.4"

outer display

5.2 mm

thin when open

A20 Pro

2 nm chip

254 g

weight

Quick facts

The numbers people ask for most: how big, how heavy, and whether both displays run at 120 Hz. They do.

Dimensions closed
117.8 × 84.1 × 11.3 mm
Dimensions open
117.8 × 164.6 × 5.2 mm
Weight
254 grams
Inner display
7.6-inch Super Retina XDR OLED, nano-texture, 1878 × 2670 (430 ppi)
Outer display
5.4-inch Super Retina XDR OLED, 1398 × 2034 (460 ppi)
Refresh rate
ProMotion up to 120 Hz, always-on (both displays)

Displays

Inner display
7.6-inch Super Retina XDR OLED, nano-texture, 1878 × 2670 (430 ppi)
Outer display
5.4-inch Super Retina XDR OLED, 1398 × 2034 (460 ppi)
Refresh rate
ProMotion up to 120 Hz, always-on (both displays)
Brightness
1000 nits typical, 1600 nits HDR, 3000 nits outdoor
Colour
HDR, True Tone, wide colour (P3)

Size and weight

Closed
117.8 × 84.1 × 11.3 mm
Open
117.8 × 164.6 × 5.2 mm (thinnest iPhone ever)
Weight
254 grams
Body
Titanium frame, IP68 (up to 6 m for 30 minutes)

Chip and memory

Chip
A20 Pro (2 nm)
RAM
12 GB
Storage
256 GB, 512 GB, 1 TB, 2 TB
Modem
Apple C2, 5G, satellite connectivity

Cameras

Rear
48 MP main + 48 MP ultra-wide (no telephoto)
Zoom
0.5×, 1×, 2× optical-quality
Inner selfie
12 MP under-display, Center Stage
Outer selfie
12 MP hole-punch, Center Stage
Exclusive
Smart Photo, Duo Preview, Eye Catcher, Camera Control button

Battery and charging

Video playback
Up to 31 hours (inner), up to 44 hours (outer)
Wired
60 W USB-C: 50% in 20 minutes
MagSafe
50% in about 30 minutes

Security and more

Unlock
Touch ID in the side button (no Face ID)
SIM
eSIM only, worldwide; dual eSIM (two active, eight or more stored)
Software
iOS 27 with Split View and Duo multitasking
Extras
Apple Pencil support (USB-C) arrives later this year, Crash Detection, hinge with minimal crease
Colours
Star White, Night Sky

What the spec sheet means in practice

Displays

Closed, the Duo is a 5.4-inch phone that is wider than an iPhone 18 Pro (84.1 mm against 71.9 mm), shorter (117.8 mm) and thicker (11.3 mm): closer to a small paperback than to a slim slab. Open, it is a 7.6-inch tablet that is 5.2 mm thin, thinner than any iPhone Apple has made. Both panels run at 120 Hz with always-on, so the outer display shows the lock screen widgets you would expect from a Pro model.

Chip and memory

The A20 Pro is the same 2 nm chip as the iPhone 18 Pro, paired with 12 GB of RAM instead of 8 GB. The extra memory is there for Split View: two full apps side by side on the inner display without reloading.

Cameras

Two 48 MP rear cameras, no telephoto. Duo Preview shows a preview of the photo on the outer display so the person you are shooting can see it; closed, the outer display doubles as a viewfinder for rear-camera selfies with the best sensor. Apple has not detailed how Duo Preview works yet.

Battery

Apple quotes 31 hours of video on the inner display and 44 on the outer. Real-world use mixing both should land around a full day and a half. 60 W wired charging is the fastest on any iPhone; the charger is sold separately.

What is missing

Face ID (replaced by Touch ID), a telephoto lens, a SIM tray and a charger in the box. Apple Pencil support is promised for later this year, not at launch. If any of those is a deal-breaker, the Dutch comparison pages put the Duo next to the iPhone 18 Pro Max and Galaxy Z Fold 8.

iPhone Duo specs: questions

How many Hz is the iPhone Duo display?
120 Hz on both. Apple lists the refresh rate as "ProMotion up to 120 Hz, always-on (both displays)", so the 7.6-inch inner and the 5.4-inch outer panel both get ProMotion, the same adaptive-rate technology as the iPhone 18 Pro. Scrolling, games and the always-on lock screen behave like on a Pro model on whichever side is open.
What are the iPhone Duo dimensions?
Closed: 117.8 × 84.1 × 11.3 mm. Open: 117.8 × 164.6 × 5.2 mm. Closed it is wider and shorter than an iPhone 18 Pro Max and about 2.5 mm thicker (11.3 vs 8.8 mm); open it is 5.2 mm thin, the thinnest iPhone Apple has made. The 7.6-inch inner display sits between a large phone and an 8.3-inch iPad mini.
How much does the iPhone Duo weigh?
254 grams, with a titanium frame. That is 53 g heavier than the Galaxy Z Fold 8 (201 g), which has the same 7.6-inch inner display, only 5 g more than an iPhone 18 Pro Max (249 g), and 39 g lighter than an iPad mini (293 g).
Does the iPhone Duo work with a keyboard?
Yes. Apple has not demonstrated the Duo keyboard; expect the iPad behaviour: a split thumb keyboard on the 7.6-inch display and a full-width keyboard in landscape. Any Bluetooth keyboard pairs and works exactly as on other iPhones and iPads, including shortcuts in Split View. Apple Pencil support (USB-C) arrives later this year, so handwriting on the inner display is not available at launch.
Can I switch from Android to the iPhone Duo?
Yes. Install Apple's free Move to iOS app on your Android phone, choose "Move data from Android" while setting up the Duo, and contacts, messages, photos, calendars and most apps come across over a private Wi-Fi connection. WhatsApp chats transfer inside the same flow. Your number moves via eSIM, since the Duo has no SIM tray. Our step-by-step guide for switching from Android covers the details (in Dutch).
Does the iPhone Duo have Face ID?
No. The iPhone Duo uses Touch ID built into the side button, like the iPad Air. Apple has not said why; the most likely reason is that the TrueDepth module does not fit in the 5.2 mm open profile. Apple Pay, app logins and unlocking all work with the fingerprint sensor.
Is there a telephoto camera?
No. The rear has a 48 MP main and a 48 MP ultra-wide camera. The 2× option is a crop from the 48 MP main sensor with optical-quality results; beyond that it is digital zoom. If you rely on 5× zoom, the iPhone 18 Pro Max is the better camera phone.
How visible is the crease on the inner display?
Apple describes the hinge as having a "minimal crease" and the inner display has a nano-texture finish that scatters reflections, which also hides the fold line. Early hands-on reports say it is visible at an angle and invisible when looking straight on. We will update this after our own review.
Which display do you use most?
The 5.4-inch outer display is a regular narrow phone: messages, maps, payments, calls. The 7.6-inch inner display sits between a large phone and an 8.3-inch iPad mini and is where Split View, reading and video happen. Apple rates battery at 44 hours of video on the outer display and 31 hours on the inner one.
Does the iPhone Duo support a physical SIM?
No. Every iPhone Duo worldwide is eSIM-only, including the Dutch model. All Dutch carriers and most European and US carriers issue eSIMs. Dual eSIM is supported, so two numbers can be active at once.
Does the iPhone Duo work with the Apple Pencil?
Not at launch. Apple says support for the Apple Pencil (USB-C) arrives later this year via a software update, on the inner display. Apple Pencil Pro and the 2nd-generation Pencil are not mentioned.
What comes in the box?
iPhone Duo with iOS 27, USB-C charge cable (1 m). No power adapter. To reach the 60 W wired speed (50% in 20 minutes) you need a 60 W or higher USB-C PD charger, such as Apple's 70 W adapter or any good third-party GaN charger.

iPhone Duo Pre-order 16 October

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