A foldable’s large inner display can be its most consequential durability trade-off. In a new TechRax video, the iPhone Duo was dropped from about 60 meters—roughly the height of a 15- to 20-story building—while open. The handset struck railings on its way down before landing on its back.
Despite the violent fall, the phone was still powered on and its exterior front glass appeared intact. The folding display did not fare as well: a white bar appeared on the inner panel, damage was visible around the edges, and the display was reportedly no longer usable after that first impact.
TechRax then repeated the experiment with the iPhone Duo folded shut. That drop sent the device down faster and frame-first, with predictably worse results, though the reported test does not provide a detailed damage breakdown for the second fall.
The test is far beyond an ordinary pocket-height accident, but it underlines the stakes for foldable mobile devices: a handset may keep running after a major impact while the flexible internal screen remains the part most likely to end its usefulness. Earlier testing cited for the iPhone Duo also found that sand could be a concern, while a robotic test reportedly reached 32,640 folds before problems appeared.
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