Durability tests reveal how the iPhone Duo handles thousands of continuous folds

YouTuber Tim Pan conducted automated stress tests folding the iPhone Duo 10,500 times with sub-zero testing, while Joanna Stern exceeded 32,000 folds. Both found the 3D-printed titanium hinge stayed sturdy and smooth throughout. However, the custom nano-texture inner display crease deepened significantly after extended folding, becoming more visible and tactile. Testing also revealed quirks including single-sided NFC positioning, lack of internal earpiece (requiring speakerphone when open), minor thermal throttling, and UI glitches when opened slowly.

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