Lines, flicker or dead pixels

Apple officially acknowledged an inner-display issue on some iPhone Duo units on Oct 26, and told affected owners to contact AppleCare for a replacement. If you're looking at a bright line, a flickering area, a white patch or a dead pixel on iPhone Duo, that statement is the starting point, but it isn't the only possible explanation.

This guide is built from Apple's statement, Apple's iPhone Duo display troubleshooting document and published reporting, not hands-on testing. The quick checks are in the steps; below is what Apple said, what owners reported, and how coverage works for each screen.

What Apple said on Oct 26

Apple told 9to5Mac it is "aware of an issue impacting the inner display" on some iPhone Duo units, and that affected owners can contact AppleCare for a replacement. According to 9to5Mac, you don't need AppleCare+ to get a replacement for this issue, and if you bought from a carrier, you should contact AppleCare directly rather than the carrier.

In a follow-up clarification reported by iClarified, Apple said affected devices appear to develop the problem relatively quickly after use. Apple hasn't said how many units are affected, and Apple hasn't said what causes it.

Macworld reports that Apple sent Apple Stores and Authorized Service Providers diagnostic and repair guidance, and that affected phones need the inner display assembly replaced. As of Macworld's Nov 2 report, there was no formal repair program.

The symptoms owners reported

The reports cluster around the fold. MacRumors described faults along the hinge that can show up as "a line of bright pixels" across one side of the screen. 9to5Mac's Oct 25 report describes cracks down the center line of the hinge, followed by a horizontal block of pixels stuck glowing white.

iClarified, citing Bloomberg's reporting, lists bright lines or a white patch on the inner display, resistance or a crunching sound when opening, damage near the center fold, a bump beneath the display, and an inner screen that registered touches the owner wasn't making while the outer screen still worked. Macworld reports owners seeing horizontal and vertical lines on the right-hand side of the inner screen.

iFixit's teardown found that the breaks cluster near the point where a flex cable gap meets the central hinge support, according to Macworld. That's what iFixit observed, not a confirmed cause. More is in the iPhone Duo teardown roundup, and physical damage at the fold has its own guide: cracks near the fold.

Not every line is the hinge issue

Apple's display and Multi-Touch troubleshooting document for iPhone Duo lists horizontal or vertical lines, a flickering image, an all-white screen, particles or debris under the glass and pixel anomalies as display issues for both the outer and inner displays. So a line on the outer display may still be a display problem, but it isn't the Oct 26 issue.

The same document says Night Shift and True Tone can look like display faults, and asks you to toggle Auto-Brightness and confirm Reduce White Point and Color Filters are off. Apple's iPhone Duo tech specs list ProMotion with adaptive refresh rates up to 120Hz and a 1 nit minimum brightness on both screens, so some changes in smoothness and brightness are by design. For what normal brightness and color behavior looks like, see brightness and color questions.

A crease you can see or feel at certain angles is a separate topic, covered in the crease explainer. A spot that feels soft rather than looks wrong is covered in soft spot along the fold.

Don't press on, flex, heat or peel the screen to test it. Apple's Cleaning your iPhone article says the nano-texture cover layer protects the inner display from scratches and dents, and tells owners not to attempt to remove it. More on that in the nano-texture layer.

Inner display vs. outer display coverage

Apple's iPhone repair page says the Apple Limited Warranty covers manufacturing issues for one year from purchase, and doesn't cover accidental damage. Apple's Oct 26 statement covers the inner display only, and 9to5Mac reports no AppleCare+ is needed for that replacement.

Accidental damage is where the two screens differ sharply. As of Nov 6, 2026, Apple's repair page listed the inner display at $999 out of warranty or $99 with AppleCare, and the outer display at $379 or $29. The full table is in Apple's iPhone Duo repair costs, and the repair calculator does the math.

The catch: Apple's repair page says Apple inspects the device to set the final fee. 9to5Mac reported that carrier customers may have had more trouble getting replacements because carriers lacked immediate stock. It helps to tell the technician exactly when the problem appeared and which screen shows it, and to say so plainly if the phone hasn't been dropped.

Return it or get it serviced?

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

If you're outside that window, service is the route. Apple's repair page offers in-person support at a Genius Bar or Apple Authorized Service Provider, and mail-in repair with a prepaid shipping box and no appointment. Apple's Contact Apple Support page lists 1-800-275-2273 for phone support in the US.

Before you go, Apple's service preparation guide says to back up, and on iOS 27 you can turn on Ready for Repair instead of turning off Find My. Bring the phone, a receipt if possible and a government-issued photo ID. The phone may come back erased, so the backup matters.

Bottom line

A bright line, white patch or phantom touches on the inner display match what owners reported around the issue Apple acknowledged on Oct 26, and Macworld reports the fix is an inner display assembly replacement, so it's a service visit, not a home fix. Settings quirks can mimic faults, so run the quick checks first, then book service with Apple. We'll update this guide if Apple publishes a formal repair program. Has Apple replaced your iPhone Duo yet?