There are two things that worry consumers when it comes to this new breed of foldable phones. Okay, three if you include the price tag. Given the Galaxy Fold's initial blunder, there are concerns about the durability of the flexible display. And given the number of times the device has to be folded and unfolded, there are also worries about how much action the hinge can see. Based on a teardown of the Motorola Razr, the phone's foldable screen isn't as fragile as Samsung's first attempt. The hinge, on the other hand, might be a different matter.