Photos posted on social media show lines that appeared on the screens of the technology giant's first ever foldable device, which has a starting price of £1,999 ($2,668) in the UK. It is Apple's most expensive iPhone ever, costing up to £3,199 for the most well-equipped models. Samsung's first foldable phone, the Galaxy Fold, suffered an early setback in 2019 when reviewers reported broken screens on the devices.
Apple's new boss starts with big gamble on £1,999 first folding iPhone Photos shared online showed faults appearing on the screens of Apple's first foldable device. The Duo's 7.6-inch (19.3cm) inner display is held together by a central hinge - a complex piece of engineering that has resulted in similar flaws in folding devices made by some of Apple's competitors.
The Duo's launch, which attracted crowds at Apple stores around the world last week, comes as the brand tries to reinvigorate its range of devices and challenge the foldable phones made by rivals.
Some Duo owners also posted photos online showing cracks along the screen's centre crease, while others reported a crunching noise when opening the device.
Android users already have a broad selection of foldable phones to choose from, technology that Apple spent years developing before the Duo's release.
When closed, the Duo looks like a wider version of an iPhone, then opens up to a device resembling a small tablet computer.
Apple did not say how many devices were affected, while some images showing faulty devices may have been created using artificial intelligence.