Apple’s first foldable iPhone combines a pocket-sized outer screen, tablet-like inner display and hinge-aware iOS 27 software, but its polished design comes with a starting price of $1,999 and several compromises.
Apple’s first foldable iPhone arrives with a clear purpose: to make a book-style device feel less like a novelty and more like an everyday tool. In CNET’s review, the iPhone Duo was praised for combining a compact 5.4-inch outer display with a 7.6-inch inner panel, alongside iOS 27 features that adapt to the phone as it folds and unfolds. Apple positions the handset as a premium, highly integrated device, with pricing starting at $1,999 for the 256GB model and rising to $3,199 for 2TB.
What stands out most is how deliberately the hardware has been shaped around the foldable format. Apple’s technical specifications list a titanium frame, Ceramic Shield 2 on both sides, and IP68 resistance, while the inner display uses a nano-texture finish designed to reduce glare and the appearance of the crease. CNET found that the phone remains slim and pocketable when closed, yet opens into a device that feels closer to a small tablet than a conventional smartphone. The result is a design that looks distinctive without feeling fragile.
That sense of coherence extends to software. Apple has said iOS 27 was rebuilt to react in real time to the Duo’s changing hinge angle, switching layouts as the device is opened, rotated or flipped between displays. CNET’s review suggests that this work pays off in day-to-day use, with the interface moving smoothly across both screens and with folding gestures influencing how apps are arranged. Apple’s own product pages also emphasise the device’s dual-display behaviour and the role of the hinge state in shaping the experience.
The Duo’s practical value is strongest when used in its different modes. According to Tom’s Guide, Apple has built around six usage states, including Closed, Open, Book, Tabletop, Tent and StandBy modes. CNET found that these transitions make the phone useful for video, note-taking, calls and split-screen work, particularly when the handset is propped up without accessories. There are limits, however: multitasking is restricted compared with some rivals, and portrait use is less flexible than landscape use on the inner screen.
Apple has also made several trade-offs in the controls and biometric system. The Duo uses Touch ID rather than Face ID, which CNET said makes unlocking and payments feel less seamless than on other recent iPhones. The review also noted that controls are biased towards right-handed use, which may frustrate left-handed owners. Still, the hardware includes the Camera Control button and Apple’s Dynamic Island, features that help the foldable feel familiar to long-time iPhone users rather than like a completely separate product line.
On cameras, Apple has chosen breadth over maximum hardware ambition. The company lists a 48-megapixel dual-fusion system, and CNET said the wide and ultrawide cameras produce sharp, vibrant images across a range of conditions. The compromise is the absence of a telephoto lens and of pro-grade capture modes such as ProRAW and ProRes, which keeps the Duo behind the iPhone 18 Pro in photographic flexibility. The inner display camera is serviceable for video calls, but it is clearly not the best option for stills or clips.
Battery life and performance appear to be among the Duo’s stronger points. Apple says the phone uses a dual-battery design, and CNET reported that the handset comfortably lasted through heavy, all-day use, while also delivering quick wired and wireless charging. The company’s A20 Pro chip and thermal system are intended to support sustained performance, and CNET’s benchmark testing placed the phone ahead of rival foldables in CPU and graphics results. That matters because the Duo is not only meant to open and close smoothly; it also needs to handle demanding apps without slowing down.
Taken together, the iPhone Duo looks like Apple’s strongest argument yet for the foldable form factor. CNET concluded that the device is not for everyone, particularly at its starting price, but judged that Apple has largely delivered a foldable that feels polished, useful and well thought through. The company may not have invented the category, but the Duo gives the design a level of integration and mainstream credibility that could influence the rest of the market.
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