Apple has finally entered the foldable smartphone market with its first foldable iPhone, officially called the iPhone Duo. Introduced in September 2026, the new device brings a completely different form factor to Apple’s iPhone lineup. Instead of using the traditional single-screen design, iPhone Duo can be opened to provide a much larger display while still remaining compact when folded.
The iPhone Duo combines Apple’s familiar iPhone experience with a foldable design, a powerful A20 Pro chip, two OLED displays, an advanced camera system, improved multitasking, and a redesigned version of iOS 27. Apple has also focused heavily on the hinge, cooling system, battery architecture, and durability.
Here are the major new features that make the iPhone Duo different from previous iPhone models.
1. Apple’s First Foldable iPhone
The biggest feature of the iPhone Duo is obviously its foldable design. This is the first time Apple has introduced an iPhone that can physically fold.
When the phone is opened, it provides a large 7.6-inch folding OLED display. When closed, users can use the 5.4-inch outer display like a traditional smartphone.
This approach gives users a large screen for watching videos, gaming, reading, and multitasking without requiring them to carry a much larger tablet-sized device. Apple describes the inner display as its largest iPhone display ever.
2. 7.6-Inch Inner Display
The inner screen is a 7.6-inch Super Retina XDR OLED display with a resolution of 1878 × 2670 pixels and 430 pixels per inch.
The display also features ProMotion with an adaptive refresh rate of up to 120Hz, HDR support, True Tone, Always-On display technology, and a special nano-texture finish designed to reduce reflections.
The larger screen can be useful for watching movies, browsing websites, editing content, gaming, and using multiple applications at the same time. The inner display also supports Apple Pencil through USB-C, although Apple says Pencil support is coming later in 2026.
3. 5.4-Inch Outer Display
When the iPhone Duo is folded, users do not have to open it every time they want to check something.
The outer display measures 5.4 inches and provides a traditional smartphone-style experience. Apple says it offers about 90 percent of the screen area of the iPhone 18 Pro.
Both displays use the same general aspect ratio, allowing content to transition between the two screens while maintaining visual continuity.
This makes the device more practical for quick tasks such as checking messages, browsing social media, making calls, or checking notifications without opening the phone.
4. A20 Pro Chip
Inside the iPhone Duo is Apple’s new A20 Pro chip, the same processor family used in the iPhone 18 Pro models.
Apple says the A20 Pro uses a 2-nanometer manufacturing process and includes a 6-core CPU, 7-core GPU, and dual 16-core Neural Engine.
The chip is designed not only for everyday performance but also for demanding workloads such as gaming, multitasking, and on-device artificial intelligence.
Apple says the A20 Pro delivers up to 20 percent faster CPU performance than the A19 Pro, while the GPU can be up to 40 percent faster and more power efficient.
5. Advanced Cooling System
Foldable smartphones have limited internal space, so managing heat is especially important.
The iPhone Duo uses a custom vapor chamber connected with the A20 Pro chip to help move heat away from the processor. Apple says this system helps the phone deliver up to 35 percent better sustained performance compared with the iPhone 17 Pro.
This can be useful during demanding activities such as extended gaming, video editing, and AI processing.
The improved thermal design is also intended to allow the phone to maintain performance for longer periods rather than relying only on short bursts of maximum performance.
6. Dual-Battery Architecture
Another interesting feature is the iPhone Duo’s battery design.
Instead of using a single conventional battery, Apple has placed batteries on both sides of the foldable device. The two batteries work together as one system while making better use of the available internal space.
Apple rates the device for up to 24 hours of typical use. Video playback can reach up to 31 hours when using the inner display and up to 44 hours when using the outer display.
The phone also supports fast charging, with Apple stating that it can reach up to 50 percent charge in around 20 minutes using a 60W-capable adapter or higher.
7. New Foldable Camera Features
The foldable design also changes how the camera can be used.
The iPhone Duo features a 48MP Dual Fusion camera system with a 48MP Fusion Main camera and a 48MP Fusion Ultra Wide camera. It supports 0.5x, 1x, and 2x optical-quality zoom options.
Because the phone has an external screen, users can use the rear cameras for selfies while seeing a preview of themselves on the outer display.
Apple calls this feature Duo Preview. It allows people taking a photo to see the live camera preview on the outer screen, making it easier to frame a shot.
8. Smart Take
The iPhone Duo also introduces a camera feature called Smart Take.
Using on-device AI, the phone can analyze a scene and automatically capture a photo when the subjects are ready. This is designed to help when the person taking the photo also wants to be included in it.
The foldable design can also be used to position the phone without necessarily needing a traditional tripod.
These features show how Apple is using the foldable form factor for more than simply providing a larger screen.
9. Under-Display FaceTime Camera
The inner display uses an under-display FaceTime camera.
This allows Apple to provide a more continuous large-screen experience without placing a traditional camera cutout in the middle of the folding display.
The camera can be used for FaceTime and video calls when the phone is opened or positioned on a surface.
The iPhone Duo also supports Center Stage, which can automatically help keep users positioned within the frame during supported video calls.
10. Split View Multitasking
One of the most useful changes comes from the software.
With the larger folding display, iPhone Duo introduces Split View, allowing users to open two apps side by side.
For example, someone could browse Safari while keeping another application open beside it. Users can also open two windows of the same application, such as Safari, and save pairs of apps for quicker access later.
This makes the iPhone Duo feel closer to a small tablet when it is fully opened.
11. Reimagined iOS 27 Experience
The iPhone Duo comes with iOS 27. Apple has adapted the operating system specifically for the foldable design.
The interface can respond as the device is opened, closed, rotated, or positioned in different ways. Content can move between displays, while supported applications can take advantage of the larger inner screen.
Apple has also provided developers with updated tools and APIs so third-party applications can take advantage of the foldable display.
Applications including Netflix, Zoom, and Slack are among those Apple says are already being adapted for the new form factor.
12. Titanium Foldable Design
Apple has used a titanium construction for the iPhone Duo.
The device comes in Star White and Night Sky finishes and uses a precision hinge designed for repeated folding.
When opened, the device measures only 5.2mm in thickness. It weighs 254 grams and has a titanium foldable design with Ceramic Shield 2 on the front and Ceramic Shield on the back.
The phone also carries an IP68 rating for water and dust resistance under Apple’s stated testing conditions.
13. Up to 2TB Storage
Apple is offering the iPhone Duo with four storage capacities: 256GB, 512GB, 1TB, and 2TB.
The 2TB option can be particularly useful for people who record a lot of high-resolution video, store large game libraries, or keep large numbers of photos and files on their phone.
The starting 256GB configuration is designed to provide a substantial amount of storage for everyday users, while the higher capacities are aimed at people with heavier storage requirements.
14. eSIM-Only Design
The iPhone Duo is an eSIM-only device worldwide.
Apple says removing the physical SIM tray allows the company to use internal space more efficiently, including for battery capacity.
Users can store multiple eSIM plans and switch between supported plans depending on their carrier and region. However, people considering the phone should check whether their local mobile network fully supports eSIM before purchasing.
15. Touch ID Instead of Face ID
The iPhone Duo takes a different approach to biometric authentication.
Instead of Face ID, Apple has integrated Touch ID into the side button. This allows users to authenticate whether the phone is folded or fully open.
This is a notable change from recent flagship iPhones, which have primarily relied on Face ID for authentication.
iPhone Duo Price and Availability
Apple lists the iPhone Duo starting at $1,999 in the United States for the 256GB model. In the UAE, Apple lists the starting price at AED 8,499.
Higher storage versions are more expensive, with the 2TB version listed at AED 13,599 in the UAE.
Apple says pre-orders begin on October 16, 2026, with availability starting October 23 in the UAE and other launch markets.
Prices in other countries can vary because of taxes, currency exchange rates, and local pricing.
Final Thoughts
The iPhone Duo represents a major change for Apple’s smartphone lineup. Instead of simply improving the traditional iPhone design, Apple has introduced a completely new form factor with a folding display.
Its 7.6-inch inner screen, 5.4-inch outer display, A20 Pro chip, advanced cooling, dual-battery architecture, foldable camera features, Split View multitasking, and redesigned iOS 27 experience make it substantially different from previous iPhones.
The device is particularly interesting for people who want a large screen for gaming, video, multitasking, and productivity but still want something that can be folded into a more compact phone.
At the same time, its high starting price, 254-gram weight, and eSIM-only design are important considerations for potential buyers. The iPhone Duo is not simply another iPhone with a larger display; it represents Apple’s first attempt to combine the traditional iPhone experience with the flexibility of a foldable device.