iPhone Duo endured 75, 000 folds before breaking
Polish tech blogger Kuba Klawiter tested the durability of the foldable iPhone Duo by repeatedly folding and unfolding it. After 75, 000 cycles, the final stress test damaged the inner screen.
The first 50, 000 folds
The iPhone Duo endured its first 50, 000 cycles with no visible changes. At this stage, the smartphone was tested under normal conditions, with no additional stress on its structure. The titanium hinge remained smooth, and no noticeable damage appeared on the inner OLED display.
Contamination test
After 50, 000 cycles, the blogger decided to simulate what it would be like to carry the smartphone for a long time in a dirty pocket. He began sprinkling fine household dust, dry dirt, and other small debris on the hinge and the area around the inner screen.
By the 60, 000-cycle mark, the crease in the display had become noticeably deeper and more deformed. The smartphone also began to make a distinct crunching sound when folded and unfolded.
Thermal stress test
The final stage of the experiment was a low-temperature test, conducted after 75, 000 cycles. The smartphone was cooled with ice water while it continued to be folded and unfolded.
At 75, 001 cycles, the inner flexible display failed: permanent vertical white lines appeared along the crease. After that, the inner screen could no longer be used normally.
Assuming 100 folds and unfolds per day, 75, 000 cycles would correspond to about two years of use.
