Well, it happened. After roughly a decade of rumours Apple has finally made a phone that bends in the middle. It’s called the iPhone Duo, it costs $1,999, and it lands in the UK on 23 October.
Announced at Apple’s “Surprise and Shine” event on 9 September (John Ternus’s first keynote as CEO, no less), the Duo is the headline act of an evening that also brought us the iPhone 18 Pro and Pro Max. But let’s be honest, nobody was watching for the Pro Max.
Here’s what you actually need to know before you decide whether your next phone is going to be a book.
What Is The iPhone Duo?
It’s a foldable iPhone. Not a flip phone (Apple was very clear on that point in its own FAQ), but a passport-style fold that opens like a very expensive notebook. Closed, you get a 5.4-inch outer display that works like a normal, if slightly stocky, iPhone. Open it up and you’re looking at a 7.6-inch inner screen that Apple says is 50 per cent larger than the iPhone 18 Pro Max.
That makes it, per Apple, the largest display ever on an iPhone and, when open, the thinnest iPhone it has ever made. Both of those things being true at once is the whole point.
“iPhone Duo is the most transformational change to iPhone since the original,” said Ternus in Apple’s press release. Big words. Then again, it’s the first new shape the iPhone has had since 2007, so we’ll allow it.
It comes in two colours, Star White and Night Sky, with a mirror-polished Grade 5 titanium frame and a hinge Apple says is built from more than 100 components. Storage runs from 256GB all the way up to a frankly ridiculous 2TB.
The Screen (And Yes, The Crease)
The question everyone asks about a foldable is the same one: can you see the line? Apple’s answer is a custom nano-texture finish on the inner display, ten ultrathin layers, and “optically clear adhesives” that let the layers glide as the screen folds, which it says minimises stress and crease. Note the word minimises. Nobody outside Apple has lived with one yet, so consider that claim pending until the reviews land.
What we can say is that the specs are proper flagship: 3,000 nits peak brightness on both screens, ProMotion up to 120Hz, and a FaceTime camera hidden under the inner display so there’s no notch interrupting your Netflix. The aspect ratio is the same inside and out, so apps don’t have an identity crisis every time you open it.
Apple is pitching this squarely as the iPhone for watching things. Films, shows, games. It’s not subtle about it.
Anything’s Posable
This is where it gets interesting for people who don’t care about nits. Because the Duo can stand up on its own, iOS 27 has been rebuilt around what Apple is calling poses: landscape, portrait, closed, seated, standing.
In practice that means StandBy works anywhere, not just on a charger, so your phone becomes a clock, photo frame or weather display on your desk. Hands-free FaceTime is exactly what it sounds like: prop it up, call your mum, keep your hands free for the glass of wine. Side-by-side apps are finally a thing on an iPhone. And Siri AI, Apple’s new conversational assistant, gets a bigger canvas to talk at you on.
Why we care: Every foldable so far has been a phone that happens to open. Apple is trying to make the opening the point, which is a much better reason to buy one than “it’s big”.
The Camera Is Doing Things For You Now
On paper, the Duo’s camera is a step down from the Pros: a 48MP main and a 48MP ultra wide, but no telephoto, so you top out at 2x optical-quality zoom against the 18 Pro’s 8x. If you’re the friend who zooms in on the stage from row Z, this is not your phone.
What you get instead is a set of features that only make sense on a phone that can stand up by itself. Smart Take waits until everyone in the frame is ready and then takes the photo, so nobody’s sprinting back from setting the timer. Duo Preview puts a live preview on the outer screen so whoever you’re photographing can see what they look like (dangerous, but useful). Kid Cue plays little animations to get toddlers to actually look at the lens. And Duo FaceTime lets you pull the people around you into a group call.
There’s also Photographic Styles 3, which now lets you tweak texture and grain for that film look, plus 4K at 120fps video and the usual Apple Intelligence editing tools, including a Clean Up that can remove bigger objects than before.
The Battery Question
Foldables have historically been a bit rubbish at this, because a hinge eats space that would otherwise be battery. Apple’s fix is a dual-battery system (one in each half), an eSIM-only design that frees up room inside, and the new C2 modem, which it says is far more efficient.
The claim is up to 31 hours of video playback on the inner screen and 44 on the outer, with fast charging getting you to 50 per cent in about 20 minutes. It also does MagSafe. As ever, those are Apple’s lab numbers, not ours.
Under the hood is the A20 Pro chip, the same one in the 18 Pro, with a vapour chamber to keep things cool during long gaming sessions or, more realistically, long TikTok sessions.
When Can You Get One?
Pre-orders open on Friday 16 October at 1pm UK time, and it ships from Friday 23 October in the UK, the US and more than 70 other countries. Apple Pencil support is “coming later this year”, which is a sentence we never expected to read about an iPhone.
If you want to see one in the flesh before committing the price of a fortnight in Formentera, it’ll be in Apple Stores from launch day.
Pre-orders open 16 October at apple.com/uk.
Some of the products and services featured in this article may be from our affiliate partners, which means we may earn a small commission if you make a purchase through these links — at no extra cost to you. Our editorial team only spotlights what we genuinely love and think you will, too.