The fold crease was never fixed, and the iPhone Duo just proved it

Samsung shipped the first mainstream folding phone in 2019. Seven years, three Samsung generations and entries from Motorola, Google and Huawei later, every fold sold still has a visible crease running down the middle of its inner screen. Nobody has fixed it, because nobody has found a hinge geometry that lets a screen fold flat without the fold line showing. The industry didn’t solve the crease. It agreed to sell around it.

Apple’s pitch with the iPhone Duo was that this time was different. A titanium frame and hinge cover. A nano-textured inner display built to scatter the light that makes a crease visible. A hinge with more than 100 components, engineered, Apple said, for a smooth feel through years of folding. And a headline spec rivals couldn’t match: IP68 dust and water resistance, beating the Galaxy Z Fold8’s IP48. Ahead of launch, Apple’s VP of Hardware Engineering Tom Marieb was asked directly about the crease holding up over time. His answer: “Hold us accountable to that, please.”

Within 48 hours of the Duo going on sale on October 23, that’s exactly what happened. Multiple owners posted photos of the inner display cracked straight along the hinge, with a bright line of dead pixels running down one side. One owner in Australia described using the phone for about six hours and opening it fewer than 20 times before feeling something give near the hinge, followed by an audible crack. No drop, no visible damage beforehand. Apple replaced the unit, which is what a one-year warranty is supposed to do, but it doesn’t say whether this is a handful of bad units or something closer to a pattern.

Separately, JerryRigEverything’s durability test found the Duo’s hinge jammed after exposure to sand and grit, despite the IP68 rating, eventually stopping the phone from closing fully. The inner display’s soft polymer surface scratched at Mohs level two, about where every foldable screen scratches, because none of them can use real glass on the part that bends. None of this means the rating is false. It means a dust-tight seal and a hinge that survives sand are two different engineering problems, and passing the first doesn’t guarantee the second.

The India numbers make the stakes concrete. Crack the Duo’s inner screen without AppleCare+ and Apple charges ₹1,49,900 to fix it, about half the price of the phone itself. The same repair on a Galaxy Z Fold8 Ultra costs ₹59,670. AppleCare+ brings the Duo’s repair down to ₹8,900, but the plan itself runs ₹51,900 a year, which makes the real price of owning this phone closer to ₹3.5 lakh than the ₹2,99,900 sticker. And Samsung’s own repair terms are a quiet admission in the same direction: the company doesn’t cover replacing the protective layer pre-applied to the inner display, because on a fold, a screen protector isn’t an accessory. It’s a structural assumption.

None of this is a reason to write off foldables. It’s a reason to stop treating “it’s a fold, what do you expect” as an answer. Apple had seven years of a rival’s mistakes to learn from, built the hinge Marieb said to hold him accountable for, and the first wave of owners found the same failure point anyway. That’s not a first-generation hiccup. That’s the same unresolved problem, wearing a better rating.