iFixit's iPhone Duo Hinge Model Points to a Center Support Bar That Doesn't Drop Far Enough, as Owners Report Cracked Inner Screens

The first one broke in Melbourne. An owner on Reddit’s r/iPhoneDuo wrote that he’d “had my iPhone Duo for about six hours and had probably opened it fewer than 20 times” when “I heard an audible crack, and the screen broke right along the hinge.” There were “no marks or damage on the inner screen’s surface,” he wrote in his post. Subreddit moderators verified it, and the Apple Store swapped the phone on the spot, MacRumors reported.

He had company within days. Another owner’s screen didn’t survive setup. A poster in China shared several demo units with the same damage. Then came less than 24 hours, not even 24 hours, another one and someone who’d joined the crackgated community. The subreddit now has a megathread. On the MacRumors forums there’s a screen crack thread and one on faulty hinges. On X, leaker Ice Universe posted photos from Chinese buyers.

“We’ve seen about ten unique instances so far,” Benjamin Mayo wrote at 9to5Mac on October 25. The usual sign is that “a horizontal block of pixels on the screen is then stuck glowing white.” tech-ish counted reports from Australia, the US, Canada, China and India.

Not every photo is what it claims to be. tech-ish found the same Chinese store photo in four or more X posts, one of them carrying a reader note saying it was AI-altered, and a joke crack wallpaper is making the rounds. Counting cracked Duos from social media means counting some twice and some that never cracked.

That’s where iFixit’s teardown comes in. Elizabeth Chamberlain, with Arthur Shi and Shahram Mokhtari, writes that “we built a 3D hinge model from teardown footage, patents, and CT scans.” The hinge is a teardrop design, the kind that lets the screen curl into a loop instead of folding flat. “Curved guides inside the hinge let those joints move as though their pivot points were inside the screen above them,” and “Apple also uses gears, springs, and a series of metal joints to control the bend.”

The photos gave them a location. “The breaks cluster near the transition from the gap for the crossing flex cable to the central hinge support,” iFixit writes. “The damage we’re seeing in photos isn’t right where the display cable passes through the hinge, but slightly lower.”

Then the model gave them a suspect. “In our closing simulation below, the center support bar fails to drop far enough. The screen’s curved fold comes down onto it, creating a small stress hotspot near the reported break location.” That bar is supposed to sink as the phone closes, making room for the loop of screen above it.

iFixit hedges, and should. “All those edges meeting in this spot mean lots of possible culprits,” it writes, calling its answer “one possible answer.” It also notes that the white bands don’t need a big crack: “A localized fault in the tiny electrical connections can affect an entire row or column of pixels.” In its video, iFixit adds that the curved rails may be lifting as the phone closes, and that a part meant to retract may not be retracting, MacRumors reported.

Play the video on YouTube

One caption on iFixit’s page quotes Reddit user leftyhyzer16: “Maybe folded it 4 times, hinge got tight and then made a loud pop when I pushed past it.” Tight, then a pop, is what a part that didn’t move out of the way would feel like from the outside.

The repair score is a provisional 5 out of 10, and “The inner display and hinge account for the biggest deduction.” That still beats the 4 out of 10 that the Fold8 and Pixel 11 Pro Fold got, per MacRumors, which quotes iFixit calling it “the most repairable foldable smartphone we’ve seen so far, and it’s still going to be a bear to repair.” iFixit also says “at least 32 unique displacements” go into the hinge, and gives Apple some credit: “For a first attempt, Apple has done well.”

Apple’s own word so far is a support page called “iPhone Duo Troubleshooting Hinge Issues.” It lists “Unexpected noise while opening or closing the device” as a symptom, says “There aren’t diagnostics or software remedies for hinge issues,” tells owners to “Check whether the hinge feels loose, stiff, or misaligned” and “Don’t use compressed air,” and ends at “replace the inner display assembly.” Officially, as 9to5Mac put it, “Apple has not given any guidance on how users are expected to handle the phone.”

What happens at the counter varies. The Melbourne owner got a new phone. tech-ish reports stores in Shanghai and Jacksonville judged the damage to be the owner’s fault, and T-Mobile told one customer replacement parts wouldn’t come until January, per The National. We covered the $999 out-of-warranty inner-screen repair last week; with AppleCare+ it’s $99. For now, iFixit notes, “Apple’s offering replacement units,” and the out-of-warranty bill is the screen.

iFixit built and ran its simulation before Apple said a word about a cause. Nobody outside Apple knows yet whether the bar sits too high in every Duo or only in a bad batch.

Apple’s troubleshooting page already tells technicians to replace the inner display. The next thing to watch is whether a replaced screen comes back cracked, or whether Apple quietly starts swapping hinges too.