Updated September 9, 2026, the day the device was announced. Every figure below is now confirmed from the announcement rather than reported from leaks.
The iPhone Duo is the phone maker's first book-style foldable phone, announced on September 9, 2026. It opens sideways like a book into a 7.6 inch inner screen, closes onto a 5.4 inch outer screen, starts at $1,999, and reaches buyers on October 23. For most of this year it was searched as the iPhone Fold and expected to be called the iPhone Ultra. Neither turned out to be the name.
This page was written before the announcement and has been rewritten with the announced figures. Where a detail was still not given, it says so rather than filling the gap with an estimate.
| Detail | Announced |
|---|---|
| Name | iPhone Duo |
| Price | $1,999 (256 GB), $2,199 (512 GB), $2,599 (1 TB), $3,199 (2 TB) |
| Preorder | Friday, October 16, 2026, 5 a.m. Pacific |
| Release | Friday, October 23, 2026, in the United States and more than 70 other countries |
| Displays | 5.4 inch outer, 7.6 inch inner, both 120 Hz |
| Folded size | 117.8 x 84.1 x 11.3 mm, 254 g |
| Unfolded thickness | 5.2 mm |
| Unlock | Touch ID in the side button, no Face ID |
| MagSafe | Supported, up to 25 W |
| Colors | Star White, Night Sky |
Is it the iPhone Duo, the iPhone Fold, or the iPhone Ultra?
It is the iPhone Duo. That is the official name, given at the September 9, 2026 announcement. The other two names are worth knowing because they are what most people typed into a search box for the past year and they still point here.
"iPhone Fold" was the working name the press and search traffic settled on, since nobody knew what the phone would be called and it obviously folded. "iPhone Ultra" was the name most reporting expected to be official, right up until the morning of the event, when a Bloomberg report said the name would be Duo instead. "iPhone 18 Fold" was how searchers tied it to this year's iPhone 18 numbering. All four names describe one device, and only one of them is real.
If you arrived here searching for a foldable iPhone under any of those names, this is the phone you were looking for.
Is the iPhone Duo a flip phone?
No, and the distinction is worth getting right before you buy. A flip phone is a clamshell: it opens top to bottom and folds down into a smaller, more compact footprint than it has open. The iPhone Duo does the opposite. It opens sideways, left to right, like a book or a passport, and the point is a bigger screen rather than a smaller phone.
Open, the inner display is 7.6 inches and wider than it is tall, closer in shape to a small tablet than to a phone. Closed, it becomes a tall, narrow slab with a 5.4 inch screen on the front, which is the screen you use for messages, calls, and anything quick. So if what you wanted was a phone that shrinks in your pocket, this is not it. It is a phone that unfolds into something larger.
The images on this page are concept renders produced before the announcement, not official images of the device.
When does the iPhone Duo come out?
Preorders open Friday, October 16, 2026, at 5 a.m. Pacific. The phone ships Friday, October 23, 2026, in the United States and more than 70 other countries and regions, with a further 28 regions following on October 30.
That is a longer wait than the usual iPhone gap. The rectangle iPhones announced at the same event reach buyers well before this one does, so if you are replacing a phone that is already failing, the Duo asks you to wait about six weeks from the announcement. Worth noting for anyone planning around a specific date: the announcement and the ship date are six weeks apart, not the few days that usually separate them.
How much does the iPhone Duo cost?
It starts at $1,999 for 256 GB, and there are four storage tiers:
- 256 GB: $1,999
- 512 GB: $2,199
- 1 TB: $2,599
- 2 TB: $3,199
The estimates that circulated before the announcement clustered around $2,000, and the base price landed a dollar under it. The top tier is the number that surprises people: at $3,199 for 2 TB, a fully configured Duo costs more than twice a base rectangle flagship. If storage matters less to you than the folding screen does, the entry tier is where the value sits.
How big is the iPhone Duo?
Two screens, two very different sets of dimensions depending on whether it is open or shut.
| Dimension | Announced figure |
|---|---|
| Outer display | 5.4 inches, 120 Hz, up to 3,000 nits outdoors |
| Inner display | 7.6 inches, 120 Hz |
| Folded | 117.8 mm tall x 84.1 mm wide x 11.3 mm thick |
| Unfolded | 165.6 mm wide x 117.8 mm tall x 5.2 mm thick |
| Weight | 254 g |
| Frame | Grade 5 titanium |
The two numbers that matter in the hand are 11.3 mm and 254 g. Folded, this is roughly twice the thickness of a normal flagship, because two halves stack. It is also heavier than any rectangle iPhone. Pre-announcement reports had guessed about 9 mm folded, so the real device is thicker than the leaks suggested, which is the kind of detail that only settles once the phone is real. Open, at 5.2 mm, it is genuinely thin, thinner than most phones on the market.
What else was announced: Touch ID, cameras, MagSafe, battery
- Unlock: Touch ID built into the side button. There is no Face ID on this phone, and it unlocks the same way whether it is folded or open.
- Cameras: two 48 MP rear cameras, a main at 26 mm and an ultra wide at 13 mm, with a 12 MP 2x crop from the main sensor. There is no dedicated telephoto lens.
- Front cameras: a 12 MP Center Stage camera on the outer screen, and a second camera under the inner display that stays hidden until you use it.
- Chip: the A20 Pro, built on a 2 nanometer process.
- Battery: two batteries, one in each half. Up to 44 hours of video on the outer screen, 31 hours on the inner one, and about 24 hours of typical mixed use.
- MagSafe: supported, charging at up to 25 W, with Qi2 at the same speed.
- Connectivity: eSIM only worldwide, with no physical SIM tray, on the company's own C2 modem, plus Wi-Fi 7 and Bluetooth 6.
- Colors: two, Star White and Night Sky.
- Not included: no Action Button, and no telephoto camera.
Does the iPhone Duo need a case, and what would one look like?
A $1,999 phone with two glass screens and a hinge is a strong argument for a case, and the announced dimensions make the shape of that case clearer than any leak did. No case for this device is confirmed today from any case maker, COCOMII included. What follows is reasoning from the announced design, not a description of a product you can buy.
A book-style fold needs a two-piece shell, one half per side, because a single rigid shell cannot wrap a device that bends in the middle, and the hinge has to stay free to move. That means three exposed surfaces instead of one: the outer screen, the inner screen, and the hinge spine. Corner protection also matters twice over, since a folded phone presents eight corners rather than four.
The announced numbers sharpen two points. At 5.2 mm open, any shell adds proportionally far more bulk to this phone than the same thickness would add to a rectangle phone, which argues for slim, precision-fit shells over rugged ones. And because MagSafe sits on one half only, magnetic mounts and wallets attach to that half specifically rather than to the phone as a whole.
The honest state of it: a case for a book-style foldable is a different piece of engineering from a case for a rectangle phone, and nobody, COCOMII included, has a confirmed case for this device today. For how case fit works on the rectangle iPhones announced at the same event, Will iPhone 17 Pro and Pro Max Cases Fit the iPhone 18 Pro and Pro Max? answers that question directly.
Should you get an iPhone Duo or an iPhone 18 Pro?
The question is now a real comparison rather than a bet on an unannounced device, and it comes down to three things: about $900, six weeks, and whether you want a folding screen enough to carry a thicker, heavier phone.
The iPhone Duo costs $1,999 against $1,199 for the iPhone 18 Pro, ships October 23 rather than in September, and weighs 254 g at 11.3 mm folded against a rectangle phone that is roughly half that thickness. In exchange you get a 7.6 inch screen that fits in a pocket, which no rectangle phone can offer.
There is also a practical difference on day one. A rectangle iPhone has cases available immediately; the Duo does not, from anyone. COCOMII cuts rectangle, flat-edge MagSafe cases for this generation, one design fitting the iPhone 17 Pro and 18 Pro, and another fitting the iPhone 17 Pro Max and 18 Pro Max. If you are moving to one of those instead, the iPhone 18 Pro and Pro Max case collection and the wider rectangle case designs are live now.
If the folding screen is the reason you are here, the sensible move is to wait for hands-on reviews between now and October 23, particularly on how the crease and the hinge hold up in daily use, which no announcement can tell you.
Frequently Asked Questions
What Is the iPhone Duo?
It is the phone maker's first book-style foldable phone, announced September 9, 2026. It opens sideways into a 7.6 inch inner screen and closes onto a 5.4 inch outer screen, starts at $1,999, and ships October 23, 2026.
When Does the iPhone Duo Come Out?
Preorders open Friday, October 16, 2026, at 5 a.m. Pacific, and the phone ships Friday, October 23, 2026, in the United States and more than 70 other countries. A further 28 regions follow on October 30.
How Much Is the iPhone Duo?
It starts at $1,999 for 256 GB. The other tiers are $2,199 for 512 GB, $2,599 for 1 TB, and $3,199 for 2 TB.
What Size Is the iPhone Duo?
The outer display is 5.4 inches and the inner display is 7.6 inches. Folded it measures 117.8 by 84.1 by 11.3 mm and weighs 254 g. Open, it is 5.2 mm thick.
Is the iPhone Duo the Same as the iPhone Fold?
Yes. iPhone Fold was the working name used in press coverage and search before the announcement, and iPhone Ultra was the name most reporting expected. The official name is iPhone Duo, and all three refer to the same device.
Is the iPhone Duo a Flip Phone?
No. It folds book-style, opening sideways into a screen wider than it is tall. A flip phone is a clamshell that opens top to bottom and folds into a smaller footprint. The Duo folds to make the screen bigger, not the phone smaller.
Does the iPhone Duo Have a Case?
No case for it is confirmed today from any case maker, COCOMII included. A book-style fold needs a two-piece shell because a single rigid shell cannot wrap a device that bends in the middle, and the hinge has to stay free to move.
Does the iPhone Duo Have MagSafe?
Yes. It supports MagSafe wireless charging at up to 25 W, and Qi2 at the same speed. Because the phone folds, the magnets sit on one half, so mounts and wallets attach to that half rather than to the whole phone.
Does the iPhone Duo Have Face ID?
No. It uses Touch ID built into the side button instead, and it unlocks the same way whether the phone is folded or open.
