CNET Lab Tests Apple iPhone Duo Durability with Custom Folding Machine

CNET's lab operations team in Louisville, Kentucky, is currently testing the $1,999 Apple iPhone Duo using a custom-built mechanical rig named the Fold-a-Phone. According to the publication, the testing machine passed 200,000 folds on Monday, Nov. 2. The project aims to evaluate the durability of the folding hinge and dual screens, providing data to complement real-world reviews.

Apple has not publicly shared official lifespan claims for the iPhone Duo. Meanwhile, CNET's testing rig also accommodates competing models such as the Samsung Galaxy Z Fold 8. The testing process and ongoing updates can be verified through CNET's published reports and weekday livestreams on YouTube.

How the Fold-a-Phone Machine Works

• Cadence and Timing: Each testing cycle takes approximately 4 seconds—1 second to open, 1 second fully open, 1 second to close, and 1 second fully closed.
• Engineering Design: Built using off-the-shelf components, industrial-grade stepper motors, and proximity sensors to halt operation if alignment issues occur.
• Custom Mounting: Phones are secured using 3D-printed custom sleds created on a Prusa Core One printer and attached with heavy-duty double-sided tape.
• Power and Safety: The setup is connected to an EcoFlow Delta 3 Plus power station to prevent interruptions from power outages.