iPhone Duo Hinge Shows Wear After More Than 451,000 Folds in Durability Test

Apple's foldable iPhone Duo has begun showing signs of hinge wear after more than 451,000 folding cycles in a three-week durability test conducted through a live broadcast by technology website CNET.

According to the website, the hinge started becoming looser after approximately 390,000 folds. At around 440,300 cycles, the opening mechanism developed a problem, preventing the screen from fully unfolding automatically and eliminating its usual clicking sound, although it could still be opened manually.

CNET confirmed that the device remains operational, with no visible screen cracks or additional malfunctions. Testing will continue until the phone reaches predefined failure conditions, including power loss, sensor failure or complete screen shutdown.

Apple has not disclosed its internal hinge durability test results or provided an estimated lifespan for the mechanism. The device features OLED displays manufactured by Samsung Display.

The findings come as the Galaxy Z Fold7 display has reportedly passed an independent durability test involving 500,000 folding cycles. CNET's ongoing experiment suggests that the iPhone Duo's display can withstand extensive folding, although the hinge's durability remains a key factor in determining the device's overall lifespan.