Apple has delayed the release of its first foldable smartphone, the iPhone Duo, after discovering a defect that caused a small number of units to crack along the internal fold line. The company announced it would replace any affected devices, though it did not provide a new availability date. The issue emerged as Apple prepared to enter the competitive foldable phone market, a segment currently dominated by Samsung and Huawei. During a recent earnings call, Apple executives did not address the delay, leaving analysts to speculate on the impact to the company's hardware roadmap. The postponement underscores the technical challenges of perfecting foldable display technology at scale. Apple has a history of entering markets later than competitors but focusing on refined execution, and the iPhone Duo delay suggests the company is maintaining that approach despite investor anticipation for its first foray into flexible-screen devices.