iPhone Duo Screen Damage: Faulty Hinge or Design Flaw?

What happened

Reports of internal display damage have emerged for Apple's first foldable smartphone, the iPhone Duo. According to industry sources on Oct. 28, following the device's launch on Oct. 23, devices reported in the United States, Australia and other markets showed similar symptoms, including cracks near the lower portion of the central fold and long white lines extending to the right; some users said they heard a cracking sound after folding and unfolding several times, followed by screen damage. The leading hypothesis is that metal components inside the external hinge may have broken or malfunctioned, damaging the back of the display; cracks in similar locations across multiple countries have raised concerns about a possible structural defect in the hinge itself. The external hinge consists of more than 100 precision components; if a connecting component breaks or the support plate fails to move properly, the metal structure could press against the back of the OLED panel, and damage to internal OLED wiring could cause bright lines. Apple uses 3D printing for the titanium hinge cover, and observers suggested its adoption, potentially motivated by cost reduction, may be linked to hinge durability issues. The device had hinge production yield problems during development; the primary external hinge supplier was changed from U.S.-based Amphenol to Taiwan's Shin Zu Shing, which also reportedly supplied 'golden samples' meeting Apple's standards. Foxconn's assembly yield reportedly stood at slightly above 60% in mid-September, with yield problems of key components such as the hinge and OLED display, supply delays and design changes cited as possible causes. Supply chain: Shin Zu Shing and Amphenol supply the external hinges; South Korea's Fine M-Tec reportedly supplies the internal hinge (backplate); Samsung Display is the exclusive foldable OLED panel supplier; upper UTG is supplied by Lens Technology and South Korea's UTI; lower UTG by Lens Technology and China's Biel Crystal. Observers believe machining or assembly issues in the external hinge could be resolved through process improvements, but a design change may be necessary if the problem lies in the hinge structure itself. Apple said it is aware of an issue affecting internal displays of a small number of iPhone Duo devices and that users should contact AppleCare for a replacement.

Impact and signal

Affected components and suppliers

Source and time

Source: The Elec · 10/28/2026 · View original source