Cracks near the fold

Some iPhone Duo owners report a crack, split or mark near the fold of the 7.6-inch inner display, and the first question is which layer it's in. Apple's top layer over the fold is a replaceable nano-texture cover; under it sits the folding display panel itself, and the two carry different repair fees. Apple inspects the device and decides what it is and what you pay.

This guide is built from Apple's pages and published reporting, not hands-on testing. For the normal fold line, see the crease explainer first.

Two layers sit over the fold

In its iPhone Duo announcement, Apple describes the top of the inner display as a scratch-resistant coating plus a nano-textured cover layer made from a custom polymer, there to protect the surface. Below that is the panel Apple's tech specs page lists as a 7.6-inch all-screen OLED folding display.

The cover layer is meant to be swapped. Kate Bergeron, Apple's vice president of hardware engineering, said it can be peeled off and replaced with a new one, MacRumors reported on Oct 1. The nano-texture layer guide covers what it does and how to clean it.

Don't try it yourself. Apple's iPhone cleaning guide calls the cover layer an integral part of the inner display and says "Don't attempt to remove it." iThinkDifferent's repair advice also says not to open the phone yourself.

Apple's display and Multi-Touch troubleshooting document doesn't describe how to tell cover-layer wear from panel damage by eye. It lists display symptoms, for both screens, such as debris under the glass, pixel anomalies, horizontal or vertical lines, flickering, a blank screen and areas that don't respond to touch. If you're seeing those, the lines, flicker and dead pixels guide is the better starting point, and the soft spot along the fold guide covers a different complaint.

What a repair costs

As of Nov 6, 2026, Apple's iPhone repair page listed a cover layer replacement at $49 without AppleCare+ or $19 with it, and inner display damage at $999 without AppleCare+ or $99 with it.

Apple says those are estimates and that it inspects the device to set the final fee. The repair calculator runs the other numbers.

What about the outer display?

A crack on the 5.4-inch outer display is a separate repair. Apple says Ceramic Shield 2 on the front has three times better scratch resistance than the previous generation, and MacRumors reports JerryRigEverything's scratch test marked the outer screen at Mohs level 7. As of Nov 6, 2026, Apple listed outer display damage at $379 without AppleCare+ or $29 with it. More in the outer display care guide.

Warranty, accidental damage and AppleCare+

Apple's one-year limited warranty covers "defects in materials and workmanship when used normally" under Apple's guidelines. It excludes damage from accidents, abuse and other external causes, and cosmetic damage such as scratches and dents, unless a defect in materials or workmanship caused the failure.

AppleCare+ is the accident cover. Apple's AppleCare page defines accidental damage as "physical damage from handling due to unexpected and unintentional events" and covers unlimited incidents, each with a service fee. Whether AppleCare+ is worth it is in the AppleCare+ value guide, and the gaps are in what AppleCare doesn't cover.

On Oct 26, Apple said it was "aware of an issue impacting the inner display" on some iPhone Duo units and told affected owners to contact AppleCare for a replacement, 9to5Mac reported. 9to5Mac says AppleCare+ isn't needed for a replacement for this issue, and owners who bought through a carrier should go to AppleCare directly.

An internal memo tells technicians to "inspect the iPhone Duo and repair or replace it in accordance with their standard procedures," MacRumors reported on Oct 30. Apple hasn't said what causes the issue. Apple's warranty says an Apple representative or authorized provider determines whether a device needs service and how it's provided, so whether a given crack is covered is Apple's call after inspection.

What durability tests and iFixit observed

JerryRigEverything's scratch test marked the inner screen at level 2, though he credited the matte nano-texture coating with hiding the marks, MacRumors reports. His bend test left a permanent green line across the inner display, and the screen then stopped responding. More in the summary of his durability test and the durability tests roundup.

In its teardown, iFixit found the cover layer peeled off easily, "as Apple intended," MacRumors reports. Removing it made the crease easier to see and left a surface more prone to scratches, iClarified reports.

Comparing owner reports with its hinge model, iFixit observed that reported damage clusters just below the gap where a flex cable crosses between the two halves. iFixit hasn't confirmed a cause, and neither has Apple. The full teardown picture is in the teardown roundup.

What to document before you take it in

Back up first. Apple's service appointment checklist says to back up, check that iCloud shows your data as saved, turn off Apple Cash, remove cards and passes from Wallet, and check iPhone Parts and Service History. Apple also says never to give your Apple Account password or device passcode to anyone. Apple's warranty adds that storage contents will be deleted during warranty service, and iThinkDifferent suggests backing up while the touchscreen still responds.

The rest is general practical advice, not an Apple requirement. Take clear photos of the mark with the screen on and off, write down the date you first noticed it and what you were doing, and note the case and any screen protector on the phone. Apple's troubleshooting document starts by removing cases and screen protectors, but if the inner screen is cracked, don't peel anything off it: tell the technician what's on it and let Apple handle it.

Those notes help you describe the problem; Apple's inspection decides coverage.

How to book service

Apple's repair page offers three routes: start a request online, mail the iPhone in using a prepaid box Apple sends, or visit an Apple Store or Apple Authorized Service Provider. For phone support in the US, Apple's Contact Apple Support page lists 1-800-275-2273.

If you bought it recently

Apple's returns page gives 14 calendar days from the date you received an item bought directly from Apple. Eligible Apple Store Online products received between Nov 6 and Dec 25, 2026 can be returned through Jan 8, 2027. iPhones carrier-financed with T-Mobile or Verizon aren't eligible for that holiday window.

Bottom line

A mark near the fold could sit in a cover layer Apple listed at $49 or a panel listed at $999 without AppleCare+ (as of Nov 6, 2026), and only Apple's inspection settles which. Back up, document what you see, leave the layer alone and book service. Have you had a fold mark looked at?