Apple says it will replace iPhone Duo handsets with screen problems
Photos shared online showed faults appearing on the screens of Apple's first foldable device.
Apple says it will replace iPhone Duo handsets with screen problems
One user said Apple had helped him replace his faulty Duo unit.
Apple says it will replace iPhone Duo handsets that have developed screen problems, just days after the much-anticipated smartphone went on sale.
Photos shared by social media users 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.
Apple said it is aware of "an issue impacting the inner display on a small number" of units and urged affected users to contact the company for a replacement.
The Duo's launch, which drew long queues at Apple stores around the world last week, comes as the brand seeks to refresh its product range and compete with the foldable phones offered 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.
The Duo's 7.6-inch (19.3cm) inner display is held together by a central hinge - a complex piece of engineering that has led to flaws in folding devices made by some of Apple's competitors.
Samsung's first foldable phone, the Galaxy Fold, suffered an early setback in 2019 when reviewers reported broken screens on the devices.