According to the Tianyancha App, Apple has applied for multiple patents related to foldable displays. Among them, the patent "Hinge for Folding Display Devices" shows that the hinge of the patent has a series of interconnected connectors. During device folding, the pin can slide along a crescent shaped slot, ensuring that adjacent connectors rotate relative to each other around the rotation axis located outside the hinge and inside the flexible display panel. According to reports, there are reports that Apple is manufacturing at least two prototypes of iPhones that can fold like flip phones.