According to sources, Apple examined OPPO's Find N series foldable display hinge technology solutions prior to the iPhone Duo launch. After the iPhone Duo went on sale, some units exhibited inner screen cracking and display abnormalities. Apple acknowledged that a small number of devices are affected and advised users experiencing the issue to contact support for a replacement, but did not disclose the specific cause of the failures. Analysts suggest that Apple's supply chain strategy—sourcing from multiple companies across multiple countries and using multiple supply solutions—may increase the difficulty of component matching and quality control. In addition, the exposed hinge design may be more vulnerable to external environmental factors, raising the risk of failure over long-term use. Apple needs to resolve the failures in the first batch of products and verify the long-term reliability of the hinge structure, striking a balance among materials, structure, manufacturing precision, and durability.