iPhone Duo Earns iFixit’s Best Foldable Score, but One Part Drags It Down

Apple’s first foldable has now been through iFixit’s full teardown treatment, just days after the iPhone Duo hit store shelves. The result is the highest repairability score the repair site has ever given a folding phone, along with a warning about the part most likely to break.

In a detailed breakdown posted on Sunday, iFixit gave the Duo a provisional 5 out of 10. That beats every other foldable it has scored, although the team admitted that’s “not saying much.”

Replacement parts aren’t available yet, which is why the score is provisional. iFixit expects them to arrive through Apple’s self-service program soon, and Apple has already published a repair manual for the device.

What Apple Got Right

Several of the Duo’s best repair features are borrowed from regular iPhones. Both batteries use Apple’s electrically released adhesive, so applying power to the release tabs makes the glue let go without the bending and prying that can puncture a cell. iFixit called it the best battery removal experience it has seen in a foldable so far.

Image: iFixit

Metal shells around the cells add another layer of protection if that debonding ever fails. The two batteries are rated at 7.5 Wh and 11.6 Wh, for a total of 19.1 Wh, which lines up with what an earlier iPhone Duo teardown found on video.

The outer display also came off intact, including the plastic frame that gave iFixit trouble during its iPhone 18 Pro teardown. That matters because several internal repairs go through that screen. Trim around the inner display came off in one piece too, unlike on Samsung’s Galaxy Z Fold8, where it crumbled during removal.

Inside, the layout is refreshingly flat. Cameras and charging hardware can be reached with little extra disassembly, and the Duo uses a single-layer logic board instead of the stacked design found in almost every iPhone since the iPhone 8. It isn’t perfect, though, since some parts are still buried under flex cables and the teardown needed five different screwdriver types.

Image: iFixit

If you just picked one up, it pays to protect that investment early, so check out this iPhone Duo case on Amazon before your first drop.

The Inner Screen Is the Real Problem

Things get much harder on the folding side. Getting the inner display out means working through adhesive and around the hinge, and the team said it “hated the inner-screen repair.” Even with the special fixtures Apple uses, iFixit described the job as delicate, finicky work.

Cost is the other hurdle. iFixit noted out-of-warranty inner screen damage runs US$999 in the United States, or about half the price of a new device. Canadian owners face an even bigger bill, with Apple listing an inner display replacement at $1,499 without AppleCare+.

Scratches are a more manageable story. Apple offers a replaceable cover layer for the inner screen, which carries the nano-texture finish, and swapping it keeps the OLED underneath. iFixit said that service costs US$49 without AppleCare or US$19 with it, though it still calls for specialized fixtures and precise alignment.

A Clue Behind Those Cracked Screens

The teardown also looked into owner reports of cracks and bright lines appearing along the fold, in some cases within hours of purchase. Using CT scans and a 3D hinge model, iFixit found the damage clusters just below where the display cable passes through the centre of the hinge, at a spot where several edges meet.

One simulation offers a possible explanation. If the centre support bar in the hinge fails to drop far enough as the phone closes, the curved screen comes down onto it and creates a small stress hotspot near the reported break location. iFixit presented this as one possible answer rather than a confirmed cause.

Dust remains a weakness as well. After working the Duo open and closed in a bag of fluorescent powder, iFixit found most of it stopped at adhesive barriers around the electronics, but enough reached the hinge to make the phone sound crunchy. That echoes the dirt test that broke an iPhone Duo over the weekend.

How Apple Hides the Crease

Under a microscope, the Duo’s nano-texture finish turned out to be tiny rounded bumps that scatter reflections and help disguise the crease. With that layer removed, iFixit said the crease was arguably more visible than on the Galaxy Z Fold8. The team also spotted oval subpixels set at different angles, which it believes may help reduce diffraction artifacts based on an Apple patent application.

Overall, iFixit said Apple did well for a first attempt, but it would still steer anyone who puts repairability first toward a conventional phone. Its parting advice to Duo owners was to baby that screen.

Between this teardown and a recent drop test where the hinge gave out, a little protection goes a long way with a $1,499 screen on the line. If you haven’t yet, grab a protective iPhone Duo case on Amazon to keep yours safe.

You can watch iFixit’s full teardown below.

Does a 5 out of 10 repairability score make you more comfortable buying an iPhone Duo, or is that inner screen repair bill a deal breaker?