iPhone Duo: Apple’s First Foldable iPhone, Price, Specs & What’s New

Apple has finally made a foldable iPhone.

The iPhone Duo opens into a large 7.6-inch display and folds down to a much smaller phone with a 5.4-inch outer screen.

It is not just an iPhone with a hinge.

Apple has also changed iOS for the folding design. You can run apps side by side, prop the phone up for video calls, preview photos on the outer screen, and even use an Apple Pencil.

Inside, you get the same A20 Pro family of chip found in Apple’s newest Pro hardware.

The price starts at $1,999 in the U.S.

Pre-orders begin on October 16, 2026, and sales start on October 23, 2026.

iPhone Duo at a Glance

Apple offers the Duo in Night Sky and Star White, with storage from 256GB all the way to 2TB.

Apple’s First Foldable iPhone

The iPhone Duo is a major change for Apple.

Closed, it works like a compact phone.

Open it, and you get a much larger screen for movies, games, reading, work, and multitasking.

The outer display measures 5.4 inches.

The folding inner display measures 7.6 inches.

Apple says the inner display gives you 50% more screen area than the iPhone 18 Pro Max.

That makes the Duo feel closer to a small tablet when open.

Yet it still folds into a device that can fit in a pocket.

How Thin Is the iPhone Duo?

The open iPhone Duo is very thin.

Apple lists it at:

• 5.2 mm thick when open
• 11.3 mm thick when closed
• 254 grams in weight

When open, it measures 6.48 inches wide and 4.64 inches tall.

At 254 grams, it is not a light phone.

That is expected.

You are carrying two displays, a hinge, and two battery sections in one device.

A Titanium Foldable Design

Apple uses Grade 5 titanium for the frame and hinge cover.

Ceramic Shield protects the front and back.

The inner screen also gets a scratch-resistant coating.

Apple rates the phone at IP68 for water and dust resistance. Its lab rating covers water down to 6 meters for up to 30 minutes under the stated test conditions.

Water resistance can fall over time, so a foldable phone should still be treated with care.

What Is the Fold Like?

The hinge lets you use the phone in several positions.

You can use it:

• Fully closed
• Fully open
• Standing upright
• Partly folded on a table
• In portrait
• In landscape

That opens up new ways to use an iPhone.

For example, you can place the Duo on a desk for a FaceTime call without a stand.

You can partly fold it to watch a movie.

You can also keep one app on each side of the large inner screen.

7.6-Inch Inner Display

The inner screen is one of the main reasons to buy the Duo.

It is a 7.6-inch Super Retina XDR OLED folding display with a resolution of 1878 by 2670 pixels.

It supports:

• ProMotion up to 120Hz
• Always-On display
• HDR
• True Tone
• Wide color
• 3,000 nits peak outdoor brightness

Apple also uses a nano-texture finish on the inner display.

The finish is designed to cut glare and make the fold line less easy to notice.

5.4-Inch Outer Display

You do not have to open the phone every time you use it.

The outer OLED display measures 5.4 inches.

It has a resolution of 1398 by 2034 pixels.

It also supports ProMotion up to 120Hz and reaches up to 3,000 nits outdoors.

The small size could make one-handed use much easier than on a Pro Max.

For a quick text, call, map check, or notification, the outer screen may be all you need.

Can You See the Crease?

Apple has made crease visibility a major part of the display design.

The inner panel uses 10 very thin layers.

It also has the nano-texture finish.

Apple says this cuts reflections and helps reduce how visible the crease appears.

We will need to see real retail units before judging how well this works in daily use.

Product photos cannot tell us how noticeable the crease will be from every angle.

Apple Pencil Support

Here is one feature that makes the large screen much more useful.

The iPhone Duo supports Apple Pencil (USB-C).

Apple says Pencil support will arrive later in 2026.

You could use it to:

• Write notes
• Mark up a PDF
• Sketch
• Sign a document
• Edit an image
• Make quick drawings

This pushes the Duo closer to an iPad mini-style use case.

iOS 27 Is Built for the Fold

A foldable screen needs more than hardware.

Apple has changed iOS to make better use of the larger display.

The Duo ships with iOS 27.1.

One major feature is Split View.

You can run two apps side by side.

For example, you could open Photos on one side and Mail on the other. Then drag an image straight into an email.

You can also pin a video while working in another app.

The phone changes its layout as you fold or turn it.

A20 Pro Performance

The iPhone Duo uses the A20 Pro chip.

It has:

• 6-core CPU
• 7-core GPU
• Neural Accelerators
• Dual 16-core Neural Engine
• Hardware ray tracing

Apple says the six-core CPU can be up to 20% faster than A19 Pro.

It also claims up to 50% more memory bandwidth.

That power should help with gaming, video editing, AI tools, and two-app multitasking.

Vapor Chamber Cooling

Foldable phones have little room for cooling.

Apple uses a custom vapor chamber inside the Duo.

The goal is to move heat away from the A20 Pro during heavy use.

That should matter when you:

• Play demanding games
• Edit video
• Use AI tools
• Run two apps at once
• Record long videos

A fast processor is useful only if the phone can keep it cool enough to stay fast.

Dual-Battery Design

The Duo does not use one normal battery pack.

Apple built a dual-battery system to make better use of the space on both sides of the hinge.

Apple rates battery life at up to:

• 24 hours of typical use
• 44 hours of video playback on the outer screen
• 31 hours of video playback on the inner screen
• 37 hours of streamed video on the outer screen
• 26 hours of streamed video on the inner screen

The larger screen uses more power, which explains the difference between the inner and outer display ratings.

How Fast Does iPhone Duo Charge?

Wired charging can reach around 50% in 20 minutes with a compatible 60W or higher USB-C power adapter.

The adapter is sold separately.

MagSafe can reach 50% in around 30 minutes with the required charger and adapter.

Wireless charging supports:

• MagSafe up to 25W
• Qi2 up to 25W

The phone uses USB-C and supports USB 3 transfer speeds up to 10Gb/s.

iPhone Duo Cameras

Apple uses a 48MP Dual Fusion camera system.

You get:

48MP Fusion Main

The Main camera has an f/1.6 aperture.

It can shoot 24MP and 48MP photos.

It also gives you a 2x optical-quality view by using the center of the sensor.

48MP Fusion Ultra Wide

The Ultra Wide camera uses a 120-degree field of view.

It can also shoot 48MP macro photos.

Together, the rear cameras give a 4x optical-quality zoom range, with digital zoom up to 10x.

There is no long telephoto camera like you get on the iPhone 18 Pro.

If long zoom matters a lot to you, the Pro may still be the better camera phone.

12MP Center Stage Front Camera

The outer screen has a 12MP Center Stage camera.

It can keep you framed during calls and selfies.

It also supports 4K Dolby Vision video up to 60 fps.

But the folding design gives you another option.

You can use the better rear cameras for selfies while using the outer screen as a preview.

That could give you much better image quality than a normal front camera.

Hidden Inner FaceTime Camera

The large folding screen also has its own FaceTime camera.

Apple places it under the display.

It stays hidden when it is not in use.

This keeps the inner screen clear of a visible camera cutout.

That camera is made more for calls than high-end selfies.

Smart Take

Smart Take is one of the most interesting camera ideas on the Duo.

The phone can watch the scene and detect when the people in the photo are ready.

It can then take the picture for you.

That means the person taking the photo does not have to rush to beat a timer.

You can prop up the phone, join the group, and let the Duo handle the shot.

Duo Preview

When you take a photo of another person, the outer screen can show them a live preview.

They can see:

• Their pose
• Framing
• Where they are in the image

That could be very useful for portraits and group photos.

Kid Cue

Parents may like this one.

Kid Cue shows playful animations on the outer display while you take a photo.

The goal is to get a child to look toward the camera at the right time.

It is a small feature, but it is a clever use of having two displays.

Duo FaceTime

The outer screen can also help during FaceTime.

People sitting near you can see the call on the outside display while you use the inner screen.

This means several people do not have to crowd around one side of the phone.

The device can also stand on its own for hands-free FaceTime.

Video Recording

The Main camera can record 4K video at up to 120 fps in Dolby Vision.

Other video features include:

• Cinematic mode
• 4K time-lapse
• Smart focus tracking
• Audio Mix
• Spatial Audio recording
• Dual Capture
• Slow motion

The folding body can also act like its own stand.

That may be useful for time-lapse video or hands-free recording.

Touch ID Returns

One of the biggest surprises is authentication.

The iPhone Duo uses Touch ID.

The fingerprint reader is built into the side button.

This makes sense on a foldable device because your finger can reach the side button whether the phone is open or closed.

It also brings fingerprint unlocking back to a high-end iPhone.

Apple Intelligence and Siri AI

The Duo supports Apple Intelligence.

It also supports Apple’s new Siri AI experience.

Apple says Siri AI can:

• Handle natural conversations
• Use personal context
• Find information from your apps
• Take actions inside supported apps
• Answer broader questions
• Work with Visual Intelligence

The large inner screen can also give Siri’s conversation view more room.

Some Siri AI features are rolling out by language and region, so not every feature will be available everywhere at launch.

Wi-Fi 7, Bluetooth 6 and 5G

Wireless features are modern.

The Duo has:

• 5G
• Apple C2 cellular modem
• Wi-Fi 7
• Bluetooth 6
• Thread
• Second-generation Ultra Wideband
• NFC

U.S. hardware also supports mmWave 5G.

No Physical SIM Card

The iPhone Duo is eSIM-only.

It can use two active eSIMs at once and store eight or more eSIM profiles.

There is no physical SIM card slot on the model listed in Apple’s current specifications.

Check carrier support before buying, especially if you travel often or use a smaller wireless company.

iPhone Duo Storage

There are four storage choices:

• 256GB
• 512GB
• 1TB
• 2TB

There is no 128GB model.

For most people, 256GB should be enough.

512GB is safer if you record lots of video.

The 1TB and 2TB versions make more sense for creators who keep large files on the phone.

iPhone Duo Colors

The first Duo comes in only two colors:

Night Sky

and

Star White

Apple uses polished Grade 5 titanium around the foldable body.

Two colors may feel limited, but Apple appears to be keeping the first generation simple.

iPhone Duo Price

The iPhone Duo starts at $1,999 in the United States.

Apple also lists financing from $83.29 per month for 24 months, subject to its terms.

That makes it far more expensive than a normal iPhone.

You are paying for:

• Foldable hardware
• Two displays
• Titanium construction
• A20 Pro performance
• Large storage options
• New multitasking features

Price will be one of the biggest reasons not to buy it.

Release Date

Apple announced the iPhone Duo on September 9, 2026.

Pre-orders open:

October 16, 2026 at 5:00 a.m. Pacific Time

Availability begins:

October 23, 2026

The Duo arrives later than the iPhone 18 Pro line.

iPhone Duo vs iPhone 18 Pro

The two phones serve different users.

Choose the Duo if the large folding screen is the main reason you are upgrading.

Choose the 18 Pro if camera range, a normal design, and lower cost matter more.

Who Should Buy the iPhone Duo?

The Duo may make sense for someone who:

• Wants Apple’s first foldable
• Watches a lot of video
• Reads on a phone
• Uses two apps at once
• Takes many FaceTime calls
• Wants Apple Pencil support
• Likes compact phones but also wants a large screen
• Uses the phone for work

It also looks useful for travel.

Closed, it is small.

Open, it gives you much more room for maps, documents, email, and video.

Who Should Skip It?

You may want to skip the first Duo if:

• $1,999 is too expensive
• You want the best long-range camera
• You prefer a light phone
• You need a physical SIM
• You do not care about multitasking
• You rarely watch video on your phone
• You are worried about first-generation foldable hardware

A normal iPhone will make more sense for many people.

The Biggest Questions Still Remain

Apple has given us the specifications.

But real-world use will tell us more.

We still need to see:

• How the hinge feels after months of use
• How visible the crease is outdoors
• How the inner screen handles scratches
• Real battery life
• App support for the folding layout
• How comfortable 254 grams feels every day

Those questions cannot be answered well until customers and independent reviewers have spent real time with the phone.

Frequently Asked Questions

Is the iPhone Duo real?

Yes. Apple officially announced the iPhone Duo on September 9, 2026.

Is it Apple’s first foldable iPhone?

Yes.

How much does the iPhone Duo cost?

It starts at $1,999 in the U.S.

When can I pre-order it?

Pre-orders begin October 16, 2026.

When will it be released?

Sales begin October 23, 2026.

How big is the inner display?

The folding inner screen is 7.6 inches.

How big is the outside screen?

It is 5.4 inches.

Does it have 120Hz?

Yes. Both displays support ProMotion with refresh rates up to 120Hz.

Does the iPhone Duo have Touch ID?

Yes. Touch ID is built into the side button.

Does it support Apple Pencil?

Yes. Apple says Apple Pencil (USB-C) support will arrive later in 2026.

What processor does it use?

The A20 Pro.

How many cameras does it have?

It has two 48MP rear cameras, a 12MP outer front camera, and an under-display inner FaceTime camera.

Does it have a telephoto camera?

It uses the Main camera for 2x optical-quality zoom. It does not have the same long telephoto setup as the iPhone 18 Pro.

Is it waterproof?

It has an IP68 water- and dust-resistance rating under Apple’s stated test conditions. Water resistance is not permanent.

How long does the battery last?

Apple rates it for up to 44 hours of video playback on the outer screen or 31 hours on the inner display.

Does it have two batteries?

Yes. Apple uses a dual-battery system.

Does it support MagSafe?

Yes, at up to 25W.

Does it have a SIM card slot?

No. Apple’s current specifications list the Duo as eSIM-only.

What colors can I buy?

Night Sky and Star White.

How much storage is available?

256GB, 512GB, 1TB, or 2TB.

Final Verdict

The iPhone Duo is Apple’s biggest iPhone design change in years.

It gives you a small phone when closed and a 7.6-inch screen when open.

The folding screen is not the only story.

Apple has also built new software around it.

Split View makes better use of two apps.

Duo Preview turns the outside screen into a camera preview.

Smart Take can help with group photos.

The phone can stand on its own for FaceTime or video.

Touch ID has also returned in the side button.

Performance should be strong thanks to the A20 Pro chip and vapor chamber.

Battery life looks promising too, with Apple claiming up to 44 hours of video playback when using the outer screen.

There are trade-offs.

The camera setup is not as flexible as the iPhone 18 Pro.

The phone weighs 254 grams.

It is eSIM-only.

And the $1,999 starting price is very high.

The biggest unknown is long-term durability.

Apple has made strong claims about the hinge, titanium body, Ceramic Shield, and inner display.

Real-world use will show how the first foldable iPhone holds up after months of opening and closing.

For someone who wants the safest, simplest iPhone, the Duo may be too much.

For someone who has been waiting for Apple to make a foldable phone, this is the iPhone they have been waiting for.