iPhone Duo

iPhone Duo — the folding iPhone with two displays

iPhone Duo is the first folding iPhone. Closed, it is a phone with a 5.4-inch display that fits in a pocket; open, it becomes a device with a 7.6-inch display. It runs on the A20 Pro chip, the enclosure is titanium, and the battery lasts up to 44 hours of video playback.

iPhone Duo — specifications

• Inner OLED display, 7.6 inches, 1878 × 2670 pixels, 430 ppi
• Outer OLED display, 5.4 inches, 1398 × 2034 pixels, 460 ppi
• ProMotion refresh rate up to 120 Hz, up to 1000 nits typical, 1600 nits peak (HDR) and 3000 nits outdoors
• A20 Pro chip — 6-core CPU (2 performance and 4 efficiency cores), 7-core GPU and a Dual 16-core Neural Engine
• 48MP Fusion Main camera (26 mm, f/1.6), 48MP Ultra Wide (13 mm, f/2.2) and 12MP 2x Telephoto (52 mm, f/1.6)
• 12MP Center Stage camera on the outside (f/2.2) and a FaceTime camera under the inner display (f/1.8)
• Up to 44 hours of video playback on the outer display, or up to 31 hours on the inner one
• Storage: 256 GB, 512 GB, 1 TB or 2 TB
• Titanium enclosure, Ceramic Shield 2 front and Ceramic Shield back, IP68 rating
• Wi-Fi 7, 5G, Bluetooth 6, USB-C with USB 3 speeds up to 10 Gb/s, dual eSIM, iOS 27

Two displays, and when you use each one

The 5.4-inch outer display covers what you do on the move — messages, calls, camera, maps. The 7.6-inch inner display opens when you need more room: two documents side by side, a film, a spreadsheet, a long video call. Apple states that the inner display is 50 percent larger than the display on iPhone 18 Pro Max.

Both displays share the same aspect ratio, so content does not reflow or jump when you open or close the phone — the app carries on where it left off. Both reach 120 Hz and 3000 nits outdoors, so there is no difference in readability outside.

Enclosure, hinge and durability

The enclosure of iPhone Duo is titanium, the front is protected by Ceramic Shield 2 and the back by Ceramic Shield. Water and dust resistance is IP68, to a depth of 6 metres for up to 30 minutes — which is unusual on folding phones.

Apple also states 35 percent recycled content in the device, of which 85 percent is recycled titanium in the enclosure itself.

A20 Pro chip

The same chip is in iPhone 18 Pro: a 6-core CPU with 2 performance and 4 efficiency cores, a 7-core GPU with Neural Accelerators and a Dual 16-core Neural Engine. The phone runs iOS 27.

Cameras

The rear system consists of a 48MP Fusion Main camera (26 mm, f/1.6) with sensor-shift stabilisation, a 48MP Ultra Wide (13 mm, f/2.2, 120-degree field of view) and a 12MP Telephoto with 2x zoom (52 mm, f/1.6), also stabilised.

On the outside there is a 12MP Center Stage camera at f/2.2, and inside a FaceTime camera placed under the display at f/1.8 — so the inner display stays whole, with no cut-out. The folding form also brings features no other model has: Smart Take, Duo Preview and Kid Cue.

Video recording

Video is recorded in 4K Dolby Vision at 24, 25, 30, 60, 100 or 120 frames per second, and 1080p Dolby Vision at 25, 30, 60 or 120. Slow motion goes up to 240 frames in 1080p, or up to 120 frames in 4K Dolby Vision.

Battery and charging

Apple states up to 24 hours of typical use. For video playback that is up to 44 hours on the outer display, or up to 31 hours on the inner one — the difference is expected, since a larger display draws more.

Charging to 50 percent takes around 20 minutes with a 60 W adapter, or around 30 minutes with a 35 W MagSafe charger. Wireless charging goes up to 25 W, over MagSafe and over Qi2.

Dimensions and weight

Closed, iPhone Duo is 84.1 mm wide, 117.8 mm tall and 11.3 mm deep. Open, it is 164.6 mm wide, the same height, and the depth drops to 5.2 mm. It weighs 254 grams.

Who it is for

iPhone Duo makes sense if you often work from your phone and keep running out of room on screen — documents, spreadsheets, several apps at once, long video calls. Also if you would otherwise carry both a phone and a small tablet.

If you mostly use your phone for messages, photos and social media, iPhone 18 Pro gives you the same power and a camera with a variable aperture, in a familiar shape and for less money.

What to know before buying

A folding phone is thicker when closed — 11.3 mm against the 8.75 mm of iPhone 18 Pro — and heavier, at 254 grams. On top of that, the rear system has two 48MP cameras and a 2x telephoto, while the Pro models have three 48MP cameras and 8x optical-quality zoom. Anyone who shoots mostly from a distance will get more out of a Pro model.

iPhone Duo next to iPhone 18 Pro Max

Both models share the A20 Pro chip, Wi-Fi 7, USB 3 and iOS 27. The differences are in the shape, the display and the camera.

• Display — Duo has 7.6 inches inside and 5.4 inches outside; 18 Pro Max has a single 6.9-inch display
• Cameras — Duo has two 48MP cameras and a 2x telephoto; 18 Pro Max has three 48MP cameras
• Zoom — Duo goes up to 2x optical quality, 18 Pro Max up to 8x
• Aperture — the main camera on the Pro models changes from f/1.48 to f/4.0, on Duo it is f/1.6
• Battery — Duo up to 44 hours of video on the outer display, 18 Pro Max up to 45 hours
• Enclosure — Duo is titanium, 18 Pro Max aluminium
• Availability — 18 Pro Max is on sale from 18 September, Duo from 23 October

If the camera matters most to you, choose iPhone 18 Pro. If the display matters most, iPhone Duo has no equal in our range.

Colours and storage

iPhone Duo comes in two colours — Night Sky and Star White. Storage is 256 GB, 512 GB, 1 TB or 2 TB, and it is chosen at purchase, because it cannot be added later.

Models on offer

With us, iPhone Duo is reserved on the page iPhone Duo, in both colours and in all four storage sizes. Apple pre-orders open on 16 October, and it goes on sale on 23 October.

Purchase, warranty and delivery

• iComp is an authorised Apple reseller — official warranty
• Service goes through the Apple Authorised Service Provider ProMobi
• Collection in person at our showroom
• Our own delivery for Novi Sad and Belgrade, on Tuesdays and Fridays
• Free delivery on orders over 100,000 RSD
• Payment in instalments through Banca Intesa and Raiffeisen bank — see Web loan
• An old device can go into a trade-in

Current stock and delivery time are shown on the product page.

Frequently asked questions

How many displays does iPhone Duo have?
Two — a 5.4-inch outer display and a 7.6-inch folding inner display.

How long does the battery last?
Up to 44 hours of video playback on the outer display and up to 31 hours on the inner one, or up to 24 hours of typical use.

Is it water resistant?
Yes, to IP68 — a depth of 6 metres for up to 30 minutes.

How much storage does it have?
256 GB, 512 GB, 1 TB or 2 TB. Storage cannot be added later.

What is the difference compared with iPhone 18 Pro?
The shape and the display. iPhone Duo folds and has two displays, while iPhone 18 Pro has a single 6.3-inch display and a third camera with 8x optical-quality zoom.

When does it arrive?
Pre-orders open on 16 October, and it goes on sale on 23 October.

What is the warranty?
Official Apple warranty, with service through ProMobi.

Transfer from your old phone

Data transfers by itself at first start-up: bring the old iPhone close to the new one and accounts, photos, messages, apps and settings move across. From Android there is an app that moves contacts, messages, photos and the calendar.

What comes with the phone

The box has a cable but no charger — that goes for every new iPhone model. If you do not have a USB-C charger, it is bought separately. Cases, screen protectors and MagSafe accessories are in the iPhone accessories.

Source of specifications: Apple — iPhone Duo