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Should You Buy iPhone Duo? Buying Guide & Checklist

Should you buy iPhone Duo or wait? Check carrier eSIM support, portability, storage, stylus timing, real cost and current delivery estimates before you order.

iPhone Duo Hong Kong vs China Version: eSIM, Activation & Returns

Hong Kong or China iPhone Duo? Compare mainland eSIM activation (model A3721), return rules and other differences before you buy, with links to Apple's own pages.

How to Make an iPhone Duo Folding Animation

Use your own media in the browser, choose a folding sequence and export a short film. This walkthrough uses the creative tools already available in Duo Studio.

What is iPhone Duo? Apple’s foldable iPhone, explained

iPhone Duo is the name Apple announced for its first foldable iPhone. Understand the product and the older Fold and Ultra names.

iPhone Duo Prices: Hong Kong, China, US & UK

iPhone Duo starts at HK$17,499 in Hong Kong and RMB 15,999 in China. Compare storage prices, local preorder dates and official buying links.

iPhone Duo Release Date: October 23 Launch & Regional Dates

iPhone Duo was released on October 23, 2026. Preorders opened October 16 at 5 a.m. PT. US, UK, China and Hong Kong dates, plus the October 30 second wave.

iPhone Duo Size Comparison vs iPhone 18 Pro Max & iPad mini

How big is iPhone Duo? Compare its screen, video area and folded size with iPhone 18 Pro Max and iPad mini, using Apple's published dimensions.

iPhone Duo specs: displays, cameras, battery & dimensions

Apple’s published iPhone Duo specifications, including the 7.6-inch inner display, A20 Pro, Touch ID and charging requirements.

iPhone Duo Storage Options & Prices: 256GB to 2TB

iPhone Duo comes in 256GB, 512GB, 1TB and 2TB. Compare each upgrade's cost in the US, UK, Hong Kong and China, then size your need with a five-line budget.

Apple September 2026 event: replay & iPhone Duo highlights

Watch Apple’s official event and separate the Duo launch schedule from the iPhone 18 Pro announcements.

iPhone Duo 3D Experience

Rotate, fold and change the light. Explore the folding form and sample apps in an independent interactive reconstruction.

Overview

Specifications

iPhone Duo specs: displays, cameras, battery & dimensions

Apple’s published iPhone Duo specifications, including the 7.6-inch inner display, A20 Pro, Touch ID and charging requirements.

Updated: the placeholder specification table has been replaced with Apple’s published data. Rumored 7.8″ / 5.5″ screen sizes are not used. Updated October 19, 2026: rated battery capacity of 4,883 mAh is from Apple’s EU product information sheet for model A3720. RAM and hinge lifespan remain unconfirmed. Updated October 22, 2026: the iOS 27.2 release candidate already supports Apple Pencil (USB-C) on both displays in hands-on testing. A public release is expected around the end of October. The launch version of iOS does not include it until 27.2 ships.

Official specifications

The table below uses Apple’s technical specification page. The rated battery capacity row uses Apple’s EU product information sheet for model A3720. Manufacturer battery and charging ratings are not measurements made by this site.

SpecificationApple’s published specifications
Displays7.6″ inner · 5.4″ outer
Refresh rateAdaptive, up to 120Hz on both displays
ChipA20 Pro · 6-core CPU · 7-core GPU
Storage256GB / 512GB / 1TB / 2TB
Rear cameras48MP Main + 48MP Ultra Wide
Front cameras12MP outer · under-display FaceTime inner
AuthenticationTouch ID in the side button
Weight254g
Closed: H × W × D117.8 × 84.1 × 11.3mm
Open: H × W × D117.8 × 164.6 × 5.2mm
Rated battery capacity4,883 mAh (Apple’s EU energy label (A3720))
Video playback¹Up to 31h inner / 44h outer
Wired charging¹50% in about 20 min; 60W+ adapter
Wireless chargingMagSafe / Qi2 up to 25W
SIMeSIM only; no physical SIM tray
ColorsStar White · Night Sky
Resistance²IP68; up to 6m / 30 min in lab conditions

¹ Apple’s test ratings; real endurance and charging speed depend on conditions. The stated wired charging test requires a separately sold 60W-capable adapter or higher. ² Water resistance is a laboratory rating, not a promise against damage in every use case.

Apple’s EU product information sheet for model A3720 also declares these test values for that model: energy efficiency class A; battery endurance of 51 hours 30 minutes per full charge; cycle life of at least 1,000 cycles; the battery is not user-replaceable; IP68 at 6 m; repeated free-fall reliability of at least 140 drops (35 when tested unfolded), class B; scratch resistance of Mohs level 5; repairability class C (2.65/5); operating-system updates for at least 5 years; and an EU minimum supplier guarantee of 12 months. These are EU declared test values. They are measured differently from Apple’s video-playback battery claims, and they are not our own testing. A3720 is only the model identifier on that EU sheet; this page does not infer model numbers for other regions. MacRumors says 4,883 mAh matches a leak of two cells, 2,962 mAh and 1,921 mAh, and that because Duo is eSIM-only the capacity should be the same worldwide.

Does it have Face ID or Touch ID?

Apple lists Touch ID in the side button. A front camera is not evidence of Face ID: the camera and authentication specifications must be read separately.

Can it use Apple Pencil at launch?

Apple originally said USB-C Apple Pencil support would arrive later in 2026, on either screen. Under the iOS 27.2 release candidate, released October 19, analyst Max Weinbach’s hands-on testing found that the USB-C model works on both the inner and outer displays. That testing is not an Apple announcement. iOS 27.2 is expected to reach the public around the end of October. The launch version of iOS does not include Pencil support until 27.2 ships, so a compatibility line in a specs list still does not mean the feature is available on day one. No support for Apple Pencil Pro has been established by the sources checked here. Apple announcement, MacRumors, AppleInsider

Does “2x Telephoto” mean a third rear camera?

No. Apple’s two-camera system uses the main camera for an optical-quality 2x option. It should not be described as a separate dedicated telephoto lens.

Can the inner display’s cover layer be replaced?

Kate Bergeron, Apple’s vice president of hardware engineering, said the inner display’s cover layer can be replaced to address wear or the crease; Apple or an authorized service provider does that replacement, and it is not a screen protector the user applies (MacRumors, Macworld).

What remains unconfirmed here?

Apple’s public specs do not give us a RAM capacity or a verified long-term hinge-life measurement. Those fields stay unfilled. Durability, heat and real-world endurance need independent testing after devices become available.

Put the numbers in context

Use the screen-size comparison to compare fitted video area and black bars, or the storage guide to turn capacity options into a personal budget.