iPhone Duo foldable issues move from inner-screen cracks in its first week to a reported outer-screen green line today

Less than one week after Apple introduced its first foldable smartphone, the iPhone Duo, user complaints have expanded from cracks along the inner folding area to a new concern: an outer panel that reportedly developed a green line today. One affected user said the line appeared in the same area associated with a black bar in a short-video application, and noted that the device had neither been dropped nor struck, making it possibly the first reported outer-screen damage case.

In recent days, the growing discussion around the iPhone Duo has led some commentators to say the episodes have forced outside observers to reassess Apple's industrial design, quality control, and supply-chain management.

Previously, Apple had acknowledged that a small number of iPhone Duo units showed inner-display problems. Owners affected by those faults could request a replacement through AppleCare. Apple also stressed that most Duo devices were not expected to be affected, and that defective units would show symptoms within a short period.

IDC analysts said the sequence of reports shows that even Apple, with its deep engineering resources and established supply-chain control, is still working through a steep learning curve in foldable hardware.

What early owners and reviewers emphasize

Based on first-batch consumer feedback, the iPhone Duo appears insufficiently mature for ordinary use, and its price is high. The Verge said its direction is clear, but the current model contains many compromises and fits the profile of a first-generation exploratory device.

A more pointed concern is price. A note from Kuai Keji said the mainland China starting price was 15999 yuan, making the experience-to-cost gap especially visible. In this framing, the handset looks more like Apple's technical trial than a mainstream buy, and ordinary buyers are advised to wait for a second-generation iteration.