Joanna Stern tested the iPhone Duo’s hinge in her sleep.
She used a custom-built robot called “Hingey” to fold the Duo 17 times per minute “for eight hours straight,” for a total of 32,640 folds. You can watch Stern’s review to see how Hingey works, and check out The Verge’s iPhone Duo review for more on Apple’s new foldable. [Media: https://www.youtube.com/watch?v=bxDTWuL9GxY]