iPhone Duo Explained: Specs, Prices, Dates and What You Give Up

What iPhone Duo is

Apple describes iPhone Duo on the iPhone Duo product page as “the first foldable iPhone.” Open, it is the thinnest iPhone ever made, with a 7.6-inch inner display 50 percent larger than the one on iPhone 18 Pro Max. Closed, it is a phone Apple compares directly to a passport.

Both panels share the same aspect ratio, so content scales proportionally and keeps its shape as the phone opens and closes. The press release calls that “visual continuity.” The inner display is built from 10 ultrathin layers with a custom nano-texture that reduces glare, and the FaceTime camera sits underneath it, hidden when not in use.

254 g in either state. iPhone 18 Pro Max for scale: 78.0 × 163.4 × 8.75 mm, 249 g.

Displays

Every brightness and motion figure applies to both screens: 1000 nits max brightness (typical), 1600 nits peak (HDR), 3000 nits peak (outdoor), 1 nit minimum, and a 2,000,000:1 contrast ratio (typical). ProMotion runs adaptive refresh rates up to 120Hz on each panel, and both carry Always-On display, Dynamic Island, HDR, True Tone, Wide color (P3) and Haptic Touch, under a fingerprint-resistant oleophobic coating and an anti-reflective coating.

Apple Pencil is on the roadmap rather than in the box. The tech specs page lists “Supports Apple Pencil (USB-C)” with a footnote reading “Coming later this year,” and the pen works on either display for notes, sketching and document markup.

Size and weight

Weight and height do not change between states, because the phone folds along its width.

Durability

The frame and the 3D-printed hinge cover are both grade 5 titanium, the mirror-polished enclosure paired with a contrasting micro-blast finish. The hinge between them is engineered from more than 100 components, there to precisely control opening and closing and support the center of the display. On the front, Ceramic Shield 2 brings 3x better scratch resistance than the previous generation of Ceramic Shield, while Ceramic Shield protects the back. Water and dust resistance is rated IP68 under IEC standard 60529, to a maximum depth of 6 meters for up to 30 minutes.

Price, storage and how to pay

Apple Upgrade lease: from $57.99 a month on a 24-month term; Apple’s stated ranges are $57.99 to $92.81 (24 months) and $82.99 to $132.81 (12 months), before tax and trade-in.

Four capacities ship: 256GB, 512GB, 1TB and 2TB. US prices come from the US buy page, India prices from the India buy page, listed as Maximum Retail Price inclusive of all taxes and quoted with instant cashback and No Cost EMI on the India product page. Apple prices the US entry model two ways, $1,999 or “$83.29 (U.S.) per month for 24 months,” and Apple Upgrade, its leasing program run through Klarna Inc., starts “as low as $57.99 (U.S.) per month for 24 months.”

Trade-in credit varies by the condition, year and configuration of the device you hand over, and is awarded on receipt of a qualifying device matching the estimate. AppleCare+ covers drops and spills, theft and loss on eligible products, battery replacement service and priority support, with AppleCare One in available markets protecting several products on one plan. Buying iPhone Duo also unlocks three months of Apple One free for new and qualified returning subscribers, in select countries and regions from September 17, 2026.

Dates and countries

• AnnouncedSep 9Apple Park keynote
• Pre-ordersOct 16Friday, 5 a.m. PT
• In storesOct 23Friday, first wave
• Second waveOct 3028 more countries

Pre-orders open at 5:00 a.m. PT on Friday, October 16, 2026, and the phone goes on sale Friday, October 23, 2026. More than 70 countries and regions are in the first wave, and Apple names Australia, Brazil, Canada, China, Colombia, France, Germany, India, Japan, Malaysia, Mexico, Singapore, South Korea, Türkiye, the UAE, the UK, the U.S. and Vietnam among them. A second wave of 28 other countries and regions follows from Friday, October 30, 2026, and every unit ships with iOS 27.1.

Chip, modem and wireless

That sustained figure comes from the cooling: a chip package inspired by M-series Apple silicon connects A20 Pro directly to a custom vapor chamber.

eSIM only, everywhere

There is no SIM tray. Apple’s tech specs state that iPhone Duo “uses advanced eSIM technology for more convenience and security (not compatible with physical SIM cards),” and the FAQ makes the policy global: “iPhone Duo is eSIM-only worldwide.” Apple’s reason is space, since the eSIM-only design “saves internal space to maximize battery capacity.”

Travellers get room to work with. The phone runs dual eSIM with two active lines and stores eight or more profiles, so a home plan and a stack of country plans sit on the device ready to switch, across more than 500 carriers worldwide. One feature is carrier-gated at launch: iPhone Handoff, which moves a single phone number between two iPhone models, arrives with T-Mobile in the US and Telekom Germany in Germany.

Battery and charging

Those figures run off two cells, not one. Apple fits “one high-energy battery on each side to maximize capacity while efficiently using internal space,” and lets Apple silicon and energy rebalancing algorithms make the pair “operate seamlessly as one.”

Bars are Apple’s stated hours for each display; the charge rows are minutes to 50 percent on a 40-minute scale. Test conditions are in Apple’s tech specs footnotes.

Every one of those claims needs an adapter Apple does not include. The box holds two things, iPhone with iOS 27 and a USB-C Charge Cable (1 m), so budget for the brick separately.

Our dedicated charging guide works through adapter picks and cable requirements in more detail.

Cameras

iPhone Duo carries a 48MP Dual Fusion camera system on the back.

Focal lengths and apertures are Apple’s tech-spec figures. The 1x and 2x angles are the standard values for 26 mm and 52 mm full-frame equivalents; Apple states only the 120° figure.

Two front cameras sit on the phone. The outer one is a 12MP Center Stage camera at ƒ/2.2 with Retina Flash, Center Stage for photos and video calls, ultra-stabilised video, and 4K Dolby Vision recording at up to 60 fps. Under the inner display sits a separate FaceTime camera at ƒ/1.8, with Center Stage for video calls, tap to zoom and rotate, Animoji and Memoji in FaceTime, and 1080p recording at 30 or 60 fps.

Five camera features exist only because a screen faces the subject:

• Smart Take: “iPhone Duo can detect when everyone is ready and takes pictures. So you don’t have to race against a timer to get in the shot.”
• Duo Preview: “The outer display lets whoever you’re photographing see a live preview of the shot, so they can get their pose and framing just right.”
• Kid Cue: “Getting kids to look at the camera just got a lot easier. Playful animations on the outer display naturally draw their eyes to the lens.” Apple sources those animations from Peanuts.
• Duo FaceTime: “Lets nearby friends join the call on the outer display. No more crowding around or passing the phone.”
• Dual Capture: “Dual Capture in FaceTime shares front and rear camera feeds simultaneously.”

Photographic Styles 3 adds texture and grain controls on top of tone and color, “to smooth out skin details or achieve an artful film look, all while staying true to your original photo.”

iOS 27 on iPhone Duo

iOS 27 moves its furniture sideways to suit a phone that changes shape.

What you give up versus iPhone 18 Pro Max

Both phones run the A20 Pro chip, so the comparison grid is not a performance story. Duo trades the Pro imaging and authentication stack for the folding hardware, and almost all of the gap is camera and video.

What iPhone Duo has that iPhone 18 Pro Max does not

The other side of the ledger is short and specific: a second display, an under-display FaceTime camera, Apple Pencil (USB-C) support, dual batteries, four ambient light sensors, and Smart Take, Duo Preview, Kid Cue and Duo FaceTime.

Row by row, this is the trade Apple is asking you to make: a folding screen, a second display and the features that only exist because a screen faces the subject, in exchange for the Pro camera stack.

Storage: how much is really yours

Apple’s own wording: a standard configuration uses approximately 12GB to 24GB of space including iOS 27 and deletable Apple apps; Apple Intelligence on-device models use approximately 7GB and can be removed. The free figure below is the tier minus the upper system bound and the models, so it is the floor, not a promise.

Apple’s disclosure is that a standard configuration uses approximately 12GB to 24GB of space, covering iOS 27 with its latest features plus Apple apps that can be deleted. Apple Intelligence on-device models account for roughly 7GB of that and can be removed if Apple Intelligence is turned off, and the deletable Apple apps use about 4.5GB.

Accessories

Both cases are orderable from Friday, October 16, 2026, both work with MagSafe, Qi2 25W and Qi-certified chargers, and the Folio adds an integrated kickstand for reading, viewing content or FaceTime; other charging gear comes from Apple’s iPhone accessories store.

FAQs

Is there a SIM tray?
No. iPhone Duo is eSIM-only worldwide and is not compatible with physical SIM cards. It runs dual eSIM with two active eSIMs and stores eight or more.

Does the inner display show a crease?
Apple describes the inner display as “wonderfully flat and smooth” and credits optically clear adhesives that let the display layers glide as the screen folds, minimizing stress and crease.

Does it use Face ID or Touch ID?
Touch ID, integrated into the side button, so authentication works the same whether the phone is open or closed. An Apple Watch can also unlock it.

What charger do I need for the 20-minute claim?
A 60W-capable adapter or higher, available separately, paired with a USB-C charging cable. For the wireless 30-minute claim, a 35W adapter or higher with a MagSafe Charger, both sold separately. The box includes only a USB-C Charge Cable (1 m).

Does it work with Apple Pencil?
Yes, with Apple Pencil (USB-C), on either display, coming later this year.

Is it water resistant?
It is rated IP68 under IEC standard 60529, to a maximum depth of 6 meters for up to 30 minutes. Resistance is not permanent and liquid damage is not covered under warranty.