[The US version of the iPhone 18 Pro Max was revealed not to use Apple’s self-developed C2 chip] On September 22, it was reported that the research organization TechInsights disassembled the US version of the iPhone 18 Pro Max and found that the cellular communication system of the machine is still equipped with the Qualcomm Snapdragon X80 chip. Information on Apple’s official website specifications page also supports this finding. On the U.S. official website, only the iPhone 18 Pro is clearly marked as equipped with a C2 chip, and the Pro Max model is not marked with modem information. In contrast, Pro and Pro Max models sold in overseas markets such as Canada and the United Kingdom are equipped with Apple's self-developed C2 chip as standard. This difference makes this top-of-the-range flagship in the US market a special case among the entire series of products, and also puts supply chain agreements under scrutiny again. The US version of iPhone 18 Pro Max has become the only model in the world not equipped with a C2 chip. The most likely reason is to fulfill the chip supply agreement signed by Apple and Qualcomm in 2023. As existing contracts gradually expire, Apple's process of fully switching to self-developed modem chips is expected to continue.