iPhone Duo crease: early units show a soft, wrinkling screen

The clip comes from a Weibo user named Kang, who pressed a fingertip into the display directly over the hinge. The surface gives way, small wrinkles form around the pressure point, and they vanish once the finger lifts. The well-known leaker Ice Universe shared it on X, and it spread fast.

Kang says several Duo units behaved the same way, describing it as basically universal, and a store contact reportedly opened a second display unit with the same result. A separate hands-on video from a customer who got a phone early shows a related effect: when you slide a finger across the middle, the crease becomes clearly visible and you can feel a slight dip. Leave the screen alone and it’s barely there.

Some demo units also reportedly don’t close completely flush on one side, though that hasn’t been widely confirmed.

This is a design choice, not a factory defect. Samsung’s Galaxy Z Fold8 uses ultra-thin glass to give its inner screen a harder surface. Apple went another way, putting a soft polymer cover layer over the inner display that’s designed to be replaced if it gets scratched. Beneath it sits high-strength glass, held with clear adhesives that let the layers slide as the phone folds.

Apple says that cover layer is 40 percent stiffer than the industry norm. It’s also cheap to swap. Apple hardware vice president Kate Bergeron has confirmed owners can peel it off and fit a new one, and a cover layer replacement under AppleCare is listed at just $19. A price that low suggests Apple expects this layer to wear.

Ice Universe has a theory about the softness: variable-thickness glass, thinner over the fold and thicker on the two wings. Corning unveiled glass like that a couple of years ago, designed to bend easily at the hinge while staying tougher elsewhere. Apple hasn’t confirmed it uses anything similar.

Read Apple’s wording closely. Its own FAQ answers the question of whether the inner display shows a crease by explaining how Apple minimizes it. It never says there isn’t one. Apple also hasn’t published a fold-cycle rating, the number of opens and closes a hinge is tested for, while rival foldables are typically rated near 250,000 folds.

That gap is the real open question. On many foldables, the crease grows more noticeable the more often the phone is opened and closed. A soft strip that wrinkles under pressure on day one could age well thanks to the replaceable layer, or it could get worse. Nobody outside Apple knows yet.

Don’t cancel your order over one video. Every report so far comes from display and demo units, not boxed retail phones, and Kang himself said retail units are the real test. But a few sensible steps will protect a very expensive purchase:

1. Try it in a store first. Run a finger across the middle of the inner screen and press lightly. If the feel bothers you now, it won’t get better.
2. Think hard about AppleCare Plus. Without it, Apple’s repair estimates are steep: $999 for inner display damage, $229 for a battery and $1,499 for other damage.
3. Don’t peel or press the cover layer. Treat it like a factory screen protector. Use a soft cloth, and don’t push on the crease to test it.
4. Watch your return window. If wrinkles appear or worsen in the first days, take it back rather than living with it.

For context on what you’re paying for, the Duo pairs a 5.4-inch outer screen with a 7.6-inch inner one, uses Touch ID on the side button instead of Face ID, runs the same A20 Pro chip as the iPhone 18 Pro and is rated IP68. It starts at $1,999 for 256GB, and online delivery estimates slipped to late January within an hour of preorders opening.

Retail iPhone Duo units start reaching customers on Friday, October 23. That’s when the first owners can test boxed phones instead of display models, and when longer-term reports will begin. The thing to watch is whether the wrinkling appears on retail units and whether the crease deepens after a few weeks of daily folding.