Apple has acknowledged an inner-display defect affecting a small number of its new $1,999 iPhone Duo foldables after customers reported hearing a crunch while unfolding the device before cracks, lines and other display failures appeared along the crease. Apple is replacing affected phones and investigating the problem. iFixit believes a failing hinge component may be pressing into and cracking the display rather than the panel itself being defective. Bloomberg reports: Reports of the problem first surfaced on Reddit and other social media sites. Bloomberg News has since independently verified the issue with more than half a dozen customers, who provided photos showing damage to their devices or evidence of their support conversations with Apple. Apple acknowledged the issue in a statement, saying it was "aware of an issue impacting the inner display on a small number of iPhone Duo units." "If users experience issues with their iPhone Duo display, they should contact AppleCare for a replacement," the Cupertino, California-based company said. Most Duos aren't affected by the problem, and the units that are impacted exhibit the defect quickly, Apple said.

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