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Apple’s first foldable iPhone, iPhone Duo, starts at $1,999 in the U.S. for 256GB. It opens to a 7.6-inch display and also has a 5.4-inch outer screen, with an A20 Pro chip, dual 48MP rear cameras and iOS 27 multitasking features.
What is iPhone Duo, and how much does it cost?
Apple introduced iPhone Duo on September 9, 2026, as its first foldable iPhone. It uses a book-style design: open it to use the larger inner display, or keep it folded and interact with the outer screen. Apple says the opened device is the thinnest iPhone it has made.
The reported U.S. starting price is $1,999 for 256GB. Tom’s Guide lists 256GB, 512GB, 1TB and 2TB configurations; the highest-storage models are reported to reach roughly $3,000. Pricing beyond the starting configuration can vary by storage tier and market.
iPhone Duo specifications
| Specification | iPhone Duo |
|---|---|
| Inner display | 7.6-inch, 1,878 × 2,670 Super Retina XDR; ProMotion, Always-On and up to 3,000 nits peak brightness (Tom’s Guide, 2026) |
| Outer display | 5.4-inch, 1,398 × 2,034 Super Retina XDR; ProMotion, Always-On and up to 3,000 nits peak brightness (Tom’s Guide, 2026) |
| Processor | Apple A20 Pro |
| Memory | 12GB RAM (Tom’s Guide, 2026) |
| Rear cameras | Dual 48MP cameras |
| Front cameras | Two 24MP cameras (Tom’s Guide, 2026) |
| Weight | 254g (Tom’s Guide, 2026) |
| Connectivity | Wi-Fi 7, Bluetooth 6, Thread, cellular and satellite connectivity |
| SIM | eSIM only |
| Water and dust resistance | IP68 (Tom’s Guide, 2026) |
Apple describes the A20 Pro as having a 6-core CPU up to 20% faster than A19 Pro, a 7-core GPU up to 40% faster, and a dual 16-core Neural Engine with twice the compute power. These are Apple’s comparisons and claims, not independent performance measurements.
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- Outstanding Military Grade Shatterproof Glass for Peace of Mind: This 9H hardness tempered glass utilizes state-of-the-art float glass processing technology that is much harder than the common 9H materials available on the market, providing superior shatter, scratch, and abrasion resistance and twice the durability of other materials. This ensures that your phone can withstand any drop or impact, providing the highest level of screen protection in any environment
- 2026 Breakthrough Exclusive One-Touch Automatic Installation Technology: especially beginner-friendly. features automatic positioning, automatic air release, automatic dust removal, and super-fast installation. Zero bubbles, precise adhesion
- 100% Ultra HD Eye Protection & Fingerprint-Free Touch: Utilizing top quality high-transparency optical material, it brings the best visual feast to your screen. Professional blue light filtering technology to create a more relaxed and comfortable viewing experience. The surface is smooth and consistent, providing the same tactile experience as the bare screen. Advanced anti-fingerprint coating technology, it can effectively prevent fingerprints from sweat and oil stains, clean as new
- Case Friendly & 3D micro-arc Technology: Compatible with 99% of phone cases. the rounded edges are polished to be comfortable to the touch, saying goodbye to sharp corners.. 1:1 size screen coverage design perfectly wraps around every curve of the screen, preserve the original beauty
Displays and foldable design
The two screens serve different situations: the 5.4-inch outer display is available without opening the phone, while the 7.6-inch inner display provides more room for reading, viewing and working with apps. Both displays are reported to support ProMotion and Always-On, with peak brightness up to 3,000 nits.
Apple specifies a titanium frame and custom hinge. Tom’s Guide describes the hinge as a titanium-and-aluminum blend and the overall shape as passport-like. The device also has a custom vapor chamber for thermal management.
Battery life and charging
Apple says the dual-battery architecture works as one system. Its video-playback estimates depend on which screen is used: up to 31 hours with the inner display, up to 44 hours with the outer display, and up to 24 hours when both displays are used equally. These are Apple’s stated maximums; actual runtime depends on use and settings.
- Wired: Apple says charging reaches 50% in around 20 minutes.
- MagSafe or Qi2 wireless: Apple says charging reaches 50% in around 30 minutes.
iOS 27 multitasking and software features
iOS 27 adapts its layout for the foldable screen. Split View places two apps side by side, and users can open two windows of the same app—for example, two Safari windows. App pairs can be saved to reopen later.
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- Compatibility: This kickstand case is only compatible with iPhone Duo 7.6 inches.
- Hidden Stable Kickstand: The hidden adjustable stand allows you to enjoy hands-free viewing everywhere. When the stand feature is not in use, this foldable stand is ready to hide and allows your iPhone Duo case to lie flat on a flat surface.
- Screen Protection: This iPhone Duo case has a responsive, scratch-resistant screen protector. Built-in temepered glass screen protector protects your front screen from drops and scratches.
- Precise Cutouts: Raised edges for extra screen and camera protection. Perfectly aligned cutouts allow easy access to the speaker, camera, buttons and other features.
- No Slip & Lightweight: While providing reasonable protection for iPhone Duo, the back cover is made of anti-slip polka dots, which provides a comfortable grip and secure hold. Slim and lightweight design, easy to carry at any time.
StandBy can run on either display even when iPhone Duo is not charging. Apple also describes Siri AI features as beta: they can use personal context, understand what is onscreen and take actions across apps. Apple says these features use on-device processing and Private Cloud Compute.
Cameras, connectivity and durability
The rear camera system has two 48MP cameras, while Tom’s Guide lists a 24MP front camera for each display. The available information establishes those camera specifications but does not give enough detail to compare image quality or specific camera modes with another phone.
Apple’s N1 chip enables Wi-Fi 7, Bluetooth 6 and Thread. The C2 modem is designed to improve cellular quality and supports U.S. mmWave. Apple also specifies satellite connectivity for use beyond cellular and Wi-Fi coverage, and says the phone is eSIM-only worldwide. Tom’s Guide reports an IP68 rating; check Apple’s regional product specifications for the exact terms of any water- or dust-resistance claim.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Official iPhone Duo cases and folio
- iPhone Duo Case: Apple’s two-part case wraps both sides of the phone. It is offered in sand and navy blue and is compatible with MagSafe, Qi2 25W and Qi-certified chargers.
- iPhone Duo Folio: Available in taupe and navy blue, it includes an integrated kickstand for reading, viewing and FaceTime.
Tom’s Guide reports Apple Pencil support on both displays, but the specific Pencil model and retail compatibility are not established here. Confirm compatibility with Apple before buying a stylus.
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- 【Case Friendly Design】Fits phones with cases up to 0.71 inch (18mm) thick. Thickened silicone backrest pads and rubber hooks help keep your device securely in place while protecting it from scratches. Devices with ring holders, wallet cases, finger grip accessories, or other bulky back attachments may not fit securely.
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What to weigh before choosing iPhone Duo
The key decision is whether the larger inner screen and foldable iOS multitasking justify the reported $1,999 U.S. entry price and 254g weight. Compare the storage tier you need, the two screen sizes, camera configuration, Apple’s battery estimates for your likely display use, charging options and the availability of a protective case or folio. For a comparison with iPhone 18 Pro Max or an Android foldable, use like-for-like storage, regional pricing and measured battery tests; the available specifications alone do not establish which phone is faster, lasts longer in real-world use or takes better photos.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
