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Multiple iPhone Duo owners say bright white lines are appearing across the inner display, often within hours of unboxing, with damage consistently located near the hinge area. Teardown analysis from iFixit and a separate YouTuber disassembly both point to possible hinge design flaws, though Apple has not confirmed a cause.
Following reports from MacRumors and Reddit users of cracked displays and faulty pixel lines near the hinge of Apple's iPhone Duo, repair specialists at iFixit built a 3D model from teardown footage, patents and CT scans to investigate. They found the breaks cluster near a connector-dense area below the cable linking the two screens, and simulations suggest the center support bar may fail to drop fully, creating a stress point where the screen's curve meets it.
iFixit has published its teardown of Apple's iPhone Duo, awarding it a provisional repairability score of 5 out of 10—the highest the site has given any foldable phone. The analysis focused heavily on the device's hinge mechanism, which combines gears, springs and interconnected metal joints with a waterdrop-shaped bend to protect the display, and the device carries an IP68 dust and water resistance rating.
Multiple iPhone Duo buyers are reporting that the device's inner foldable screen cracks along the hinge's center line, leaving a horizontal band of white, glowing pixels. About ten similar cases have surfaced on Reddit since the device launched Friday, with some units failing during initial setup. Apple Store customers have generally received replacements, while some carrier buyers say they were denied help or blamed for the damage.
Apple's new foldable phone, the iPhone Duo, starts at $2,000 and lets users fold the device into a tent-like stand. A columnist reports that while many mainstream iOS apps still render poorly on the Duo's unfolding screen, some developers have begun building apps specifically optimized for its foldable design.
Developers have begun releasing apps designed around the iPhone Duo's folding hinge and dual screens, with Apple adding a 'Made for iPhone Duo' badge to highlight ones built for the larger display. Examples include Battlefleet Duo, a board-game-style naval battler that uses tabletop mode for local multiplayer, and Flipcorder, a retro camcorder app that turns opening the device into 'removing the lens cap.' A reviewer who has covered Android foldables for years says their inbox has seen an unusual surge of pitches from indie developers eager to showcase apps for Apple's first foldable phone.
Early buyers of Apple's new iPhone Duo foldable are reporting cracked inner displays near the hinge crease shortly after purchase. One Reddit user said their screen cracked audibly after fewer than 20 folds within six hours of ownership, and Apple replaced the device on the spot at an Apple Store. Similar reports have surfaced from early markets including China and Australia.
CNET's Kerry Wan tested early apps built for Apple's new foldable iPhone Duo, highlighting Netflix and NYT Cooking as among the most polished so far. Apps optimized for the device's flexible screen will carry a 'Made for iPhone Duo' badge on the App Store, while a separate web tracker monitors which popular apps still lack support.
A user reports that their iPhone Duo foldable broke along its internal hinge after only about six hours of use and fewer than 20 open-close cycles. The owner described feeling something shift near the hinge beneath the screen, followed by an audible crack and a visible break at that point. No external damage or marks were found on the hinge or screen surface that would explain the failure.
Early reviews of Apple's first foldable iPhone, the iPhone Duo, converge on a consistent set of findings. Critics call it the best foldable phone currently available, while flagging a visible and tangible crease, lagging third-party app support for the inner screen, and a design better suited to people who plan to use the unfolded display often rather than occasionally.
9to5Mac published a hands-on review of the iPhone Duo, Apple's first foldable iPhone, after a week of testing. The reviewer reports the device weighs 254 grams, measures 11.3mm thick when folded and 5.2mm when unfolded, and has a folded footprint of 117.8mm by 84.1mm, noting it feels more comfortable to hold than the iPhone 18 Pro Max despite being heavier.
Engadget's review of Apple's iPhone Duo foldable describes a 5.4-inch 120Hz OLED outer display with up to 3,000 nits brightness, paired with a 7.6-inch inner panel sharing the same aspect ratio and interface for a seamless transition. The inner screen uses a matte nanotexture coating to reduce glare and hide the crease, which is replaceable for $49 but can be damaged if peeled at improperly, with no on-device warning against doing so.