Apple has officially entered the foldable smartphone market with the iPhone Duo. It is the company’s first iPhone with two connected displays and a design that can transform from a compact phone into a 7.6-inch tablet-style device.
Although many people are calling it the “iPhone 18 Duo,” Apple’s official product name is simply iPhone Duo. It was introduced alongside the iPhone 18 Pro and iPhone 18 Pro Max.
The iPhone Duo combines a titanium folding body, two 120Hz OLED displays, the A20 Pro chip, a dual-battery system, Touch ID and two 48MP rear cameras. It also introduces camera and multitasking features designed specifically around its outer and inner displays.
Here is a detailed look at the iPhone Duo features, specifications, price in India, release date, cameras, battery life and foldable design.
iPhone Duo Key Features at a Glance
| Official name | Apple iPhone Duo |
|---|---|
| Device type | Book-style foldable iPhone |
| Inner display | 7.6-inch Super Retina XDR folding OLED |
| Outer display | 5.4-inch Super Retina XDR OLED |
| Refresh rate | ProMotion up to 120Hz on both displays |
| Peak outdoor brightness | Up to 3,000 nits |
| Processor | A20 Pro with 6-core CPU and 7-core GPU |
| Rear cameras | 48MP Main and 48MP Ultra Wide |
| Outer front camera | 12MP Center Stage camera |
| Inner camera | Under-display FaceTime camera |
| Authentication | Touch ID in the side button |
| Battery | Dual built-in rechargeable batteries |
| Storage options | 256GB, 512GB, 1TB and 2TB |
| Operating system | iOS 27 |
| Colours | Night Sky and Star White |
| Starting price in India | ₹2,99,900 |
| Pre-orders in India | October 16, 2026, from 5:30 PM IST |
| Availability | October 23, 2026 |
Apple’s First Foldable iPhone
The iPhone Duo uses a book-style folding design. When closed, its outer screen functions like a conventional smartphone. Opening the device reveals a much larger inner display suitable for entertainment, productivity and multitasking.
Apple says the inner display offers 50% more screen area than the iPhone 18 Pro Max while the outer display provides more than 90% of the screen area of the iPhone 18 Pro.
Instead of limiting the phone to fully open or closed positions, the hinge allows it to be used in several orientations.
Landscape position
Opening the phone horizontally creates a wide display for watching movies, playing games and using two applications side by side.
Portrait position
The portrait orientation provides a wider keyboard and more space for browsing, reading and scrolling. Users can also keep a video at the top while using another application below it.
Seated position
The device can rest partially folded on a surface. This position can be used for watching a show, following a workout or accessing controls without holding the phone.
Standing position
The iPhone Duo can stand in an inverted V-shaped position. Users can display photos, clocks and widgets with StandBy or watch content on the outer display at an adjustable angle.
Titanium Design and Durability
The iPhone Duo uses a Grade 5 titanium frame and titanium hinge cover. Its inner display has a scratch-resistant coating, while Ceramic Shield protects the front and back surfaces.
Apple has also given the device an IP68 water- and dust-resistance rating. Under controlled laboratory conditions, it is rated for water resistance at a maximum depth of six metres for up to 30 minutes.
Water and dust resistance may decrease through normal wear. A foldable phone also contains more moving components than a conventional smartphone, so careful handling remains important.
How Thin and Heavy Is the iPhone Duo?
When fully open, the iPhone Duo measures only 5.2mm in depth. When closed, it measures 11.3mm.
| Measurement | Open | Closed |
|---|---|---|
| Width | 164.6mm | 84.1mm |
| Height | 117.8mm | 117.8mm |
| Depth | 5.2mm | 11.3mm |
| Weight | 254 grams | |
At 254 grams, it is heavier than a conventional iPhone, which is understandable because the device includes two displays, two batteries and a mechanical hinge.
7.6-Inch Inner Foldable Display
The main inner screen is a 7.6-inch Super Retina XDR folding OLED display with a resolution of 1878 × 2670 pixels and a density of 430 pixels per inch.
The display is made from ten ultra-thin layers. Apple has added a custom nano-texture finish to reduce glare and wide-angle OLED technology to maintain visibility when the phone is viewed from different positions.
Its important display features include:
- ProMotion adaptive refresh rate up to 120Hz
- Always-On display
- HDR support
- True Tone
- Wide colour support
- Haptic Touch
- Up to 3,000 nits outdoor peak brightness
- Anti-reflective coating
- Fingerprint-resistant coating
- Apple Pencil USB-C support
The under-display FaceTime camera stays hidden beneath the inner panel when it is not being used, giving the main screen a cleaner and less interrupted appearance.
5.4-Inch Outer Display
When the iPhone Duo is closed, users interact with a 5.4-inch Super Retina XDR OLED display. It has a resolution of 1398 × 2034 pixels and a density of 460 pixels per inch.
The outer display supports the same major technologies as the inner screen, including ProMotion up to 120Hz, Always-On functionality, HDR, True Tone and up to 3,000 nits outdoor brightness.
This means the outer panel is not simply a secondary notification screen. It is designed to function as a complete iPhone display for messaging, calls, apps, maps, photography and everyday use.
Split View Multitasking in iOS 27
The large inner display would not be very useful without software built to take advantage of it. Apple has redesigned parts of iOS 27 for the iPhone Duo’s different positions and screen sizes.
Split View allows users to run supported applications side by side. For example, someone could browse the Photos library on one side and drag a photograph directly into Mail on the other.
Possible Split View uses include:
- Reading email while checking a calendar
- Watching a video while replying to messages
- Taking notes while browsing a website
- Comparing two documents
- Moving images between supported applications
- Using Maps alongside travel information
App developers will need to ensure their layouts adapt properly to the inner display, outer display and partially folded positions.
A20 Pro Chip and Performance
The iPhone Duo is powered by Apple’s A20 Pro chip.
It includes:
- 6-core CPU with two super cores and four efficiency cores
- 7-core GPU with Neural Accelerators
- Dual 16-core Neural Engine
- Hardware-accelerated ray tracing
Apple says its six-core CPU is up to 20% faster than the A19 Pro and provides up to 50% more memory bandwidth.
A vapour-chamber cooling system helps control heat during demanding applications, gaming, video processing and AI workloads. Thermal management is particularly important in a foldable device because each half of the phone has limited internal space.
48MP Dual Fusion Camera System
The iPhone Duo has two rear cameras rather than the three-camera system used on Apple’s Pro models.
48MP Fusion Main camera
The main camera uses a 26mm lens with an f/1.6 aperture and sensor-shift optical image stabilisation. It can capture high-resolution 24MP and 48MP photographs.
The same sensor also enables a 12MP 2x optical-quality Telephoto option with a 52mm field of view.
48MP Fusion Ultra Wide camera
The Ultra Wide camera uses a 13mm lens, f/2.2 aperture and 120-degree field of view. It can also produce 24MP and 48MP high-resolution photographs.
The phone supports features such as Night mode, Photographic Styles, Cinematic mode, spatial audio recording, smart focus tracking and 4K Dolby Vision video.
Duo Preview
Duo Preview uses the outer display while a photograph is being taken with the rear cameras.
The person being photographed can see a live preview of the composition on the outer display. This allows them to correct their position, expression and framing before the photograph is captured.
It is a simple feature that takes practical advantage of having a display on both sides of the open device.
Smart Take
Smart Take can detect when everyone in a group is ready and automatically capture the photograph.
This is designed to help the person taking the photograph join the group without having to race against a basic camera timer.
Kid Cue
Getting a child to look directly at a camera can be difficult. Kid Cue displays playful animations on the outer screen to attract a child’s attention towards the camera.
This is another feature that would not be possible in the same way on a traditional single-screen iPhone.
Duo FaceTime
Duo FaceTime allows nearby people to participate in a FaceTime call using the outer display while the primary user continues viewing the call on the inner display.
The phone can also stand on its own during a FaceTime call, removing the need to hold it or use a separate stand.
Front and Under-Display Cameras
The outer display includes a 12MP Center Stage front camera. Center Stage can adjust framing to keep the user and nearby people visible during calls or selfies.
The inner display includes an under-display FaceTime camera with an f/1.8 aperture. It supports Center Stage for video calls, tap-to-zoom controls, automatic image stabilisation and 1080p video recording.
Touch ID Returns
The iPhone Duo uses Touch ID built into the side button.
This is one of its biggest differences from recent flagship iPhones, which primarily use Face ID. A side-mounted fingerprint sensor occupies less internal space and remains easy to reach whether the phone is folded or open.
Apple’s official technical specifications list Touch ID but do not list Face ID as the device’s main biometric authentication system.
Dual-Battery System and Battery Life
The iPhone Duo contains two rechargeable lithium-ion batteries, allowing Apple to use the internal space available in both halves of the device.
Apple rates the phone for:
| Usage | Apple rating |
|---|---|
| Typical use | Up to 24 hours |
| Video playback on outer display | Up to 44 hours |
| Video playback on inner display | Up to 31 hours |
| Streamed video on outer display | Up to 37 hours |
| Streamed video on inner display | Up to 26 hours |
The difference between inner and outer display battery life is expected because the 7.6-inch folding panel requires more power.
Charging Speed and MagSafe
With a compatible 60W or higher wired adapter, Apple says the iPhone Duo can reach up to 50% charge in approximately 20 minutes.
With a compatible 35W or higher adapter and MagSafe Charger, it can reach up to 50% in approximately 30 minutes.
The device supports:
- USB-C charging
- MagSafe wireless charging up to 25W
- Qi2 wireless charging up to 25W
- USB 3 data transfer up to 10Gbps
- DisplayPort video output
Power adapters and some charging accessories are sold separately.
Apple Pencil Support
The iPhone Duo supports Apple Pencil USB-C, making it the first iPhone designed to work with an Apple Pencil.
The 7.6-inch inner screen could make the Pencil useful for:
- Writing quick notes
- Signing documents
- Marking screenshots
- Sketching
- Photo editing
- Working with supported productivity apps
The Apple Pencil is not built into the phone and must be purchased separately.
Siri AI and Apple Intelligence
The iPhone Duo includes Apple Intelligence and Apple’s new Siri AI experience.
Apple says Siri AI can:
- Hold more natural conversations
- Answer open-ended questions
- Use personal context from supported apps
- Find relevant emails, photographs and notes
- Perform actions in applications
- Reference current information from the web
- Help draft and improve written content
- Respond to objects visible through the camera
Siri AI is rolling out in English, and some features may have usage limits or regional restrictions.
Wi-Fi 7, Bluetooth 6 and C2 Modem
The iPhone Duo includes Apple’s N1 wireless networking chip and C2 cellular modem.
Connectivity features include:
- 5G connectivity
- Wi-Fi 7 with 2x2 MIMO
- Bluetooth 6
- Thread networking technology
- Second-generation Ultra Wideband chip
- NFC with reader mode
- Precision dual-frequency GPS
eSIM Only—No Physical SIM Slot
The iPhone Duo is an eSIM-only device. It does not support a physical SIM card.
It supports two active eSIMs and can store eight or more eSIM profiles. This can be convenient for users who maintain personal and business numbers or frequently travel between countries.
Before purchasing: Confirm that your mobile network supports eSIM and that eSIM activation is available for your plan. This is especially important if you regularly switch physical SIM cards.
iPhone Duo Colours and Storage
Apple offers the iPhone Duo in two colours:
- Night Sky
- Star White
Available storage options are:
- 256GB
- 512GB
- 1TB
- 2TB
The 2TB model is aimed at professionals and users who record large amounts of high-resolution video or store extensive media libraries locally.
iPhone Duo Price in India
| Storage | India price |
|---|---|
| 256GB | ₹2,99,900 |
| 512GB | ₹3,24,900 |
| 1TB | ₹3,74,900 |
| 2TB | ₹4,49,900 |
The iPhone Duo is the most expensive iPhone Apple has released. Even its base model sits well above the iPhone 18 Pro and iPhone 18 Pro Max.
iPhone Duo Pre-Order and Release Date in India
Apple will begin accepting iPhone Duo pre-orders in India at 5:30 PM IST on October 16, 2026.
The phone will become available from October 23, 2026.
Initial availability may be limited because producing foldable OLED displays and precision hinges is more complicated than manufacturing a conventional smartphone.
Who Should Consider the iPhone Duo?
The iPhone Duo may be suitable for:
- Users who want an iPhone and compact tablet in one device
- Professionals who regularly multitask on their phones
- People who watch a large amount of video content
- Creators who can use Duo Preview and hands-free recording
- Users interested in Apple Pencil support
- Early adopters who want Apple’s first foldable device
It may not be the right choice for users who prioritise a lightweight phone, physical SIM support, lower repair costs or the dedicated telephoto camera found on Pro models.
Important Limitations to Consider
Despite its impressive features, buyers should consider several practical limitations:
- The starting price is ₹2,99,900 in India
- The device weighs 254 grams
- It does not have a physical SIM slot
- It uses Touch ID instead of Face ID
- It does not include a dedicated long-range telephoto lens
- The inner folding display may require more careful handling
- Repair costs could be high
- Not every third-party app may immediately support its layouts
- Battery life is lower when using the large inner display
Independent durability, battery and camera testing will provide a clearer understanding once the phone reaches customers.
Frequently Asked Questions
Is it called iPhone 18 Duo or iPhone Duo?
Apple’s official product name is iPhone Duo. “iPhone 18 Duo” is an unofficial name commonly used because the phone launched alongside the iPhone 18 Pro series.
What is the iPhone Duo price in India?
The iPhone Duo starts at ₹2,99,900 for 256GB. The 2TB version costs ₹4,49,900.
What is the iPhone Duo display size?
It has a 7.6-inch inner folding OLED display and a 5.4-inch outer OLED display.
Does iPhone Duo have a 120Hz display?
Yes. Both displays support ProMotion with an adaptive refresh rate of up to 120Hz.
Does iPhone Duo support Apple Pencil?
Yes. Apple’s specifications list support for the USB-C Apple Pencil.
Does iPhone Duo have Face ID?
Apple lists Touch ID built into the side button as its biometric authentication system. Face ID is not listed as the primary authentication feature.
Does iPhone Duo support a physical SIM?
No. It is an eSIM-only device supporting two active eSIMs and storage for eight or more profiles.
When will the iPhone Duo launch in India?
Pre-orders begin on October 16, 2026, at 5:30 PM IST. General availability begins October 23.
Is the iPhone Duo waterproof?
It has an IP68 water- and dust-resistance rating. Water resistance is not permanent and can decrease through normal wear.
Final Thoughts
The iPhone Duo is more than an iPhone with a folding screen. Apple has redesigned important parts of iOS, photography, multitasking and video calling around its dual-display system.
Its 7.6-inch inner display, 5.4-inch outer screen, A20 Pro processor, dual 48MP cameras, Apple Pencil support and flexible viewing positions make it one of Apple’s most ambitious devices.
The biggest obstacle is its price. Starting at ₹2,99,900, the iPhone Duo is clearly intended for premium buyers, professionals and early adopters rather than the average smartphone user.
For those who want the largest iPhone display and a phone that can also work like a compact tablet, the iPhone Duo offers something no previous iPhone could provide.
