Apple to replace iPhone Duos affected by screen problem
Photos shared online showed faults appearing on the screens of Apple's first foldable device.
Apple has acknowledged some of its iPhone Duo handsets have developed problems with their screens, just days after the highly-anticipated smartphone went on sale.
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.
Apple said it was aware of "an issue impacting the inner display on a small number" of the phones and urged affected users to contact the company for a replacement.
But he added the early reports of issues also showed "that even a company with Apple's engineering resources and supply chain discipline faces a steep learning curve in foldables".