When Apple finally stepped into the foldable smartphone arena with its iPhone Duo, it did not simply introduce a new product — it handed Korean consumers a mirror in which to weigh their choices. The reflection, it turned out, favored Samsung: Galaxy Z Fold 8 sales climbed roughly 10 percent in the week following Apple's announcement, as a price gap exceeding one million won proved more persuasive than the allure of a new entrant. In markets where consumers are as price-literate as they are brand-aware, a competitor's arrival can sometimes be the surest advertisement for the incumbent.