Apple's in-house C2 modem will power most of the iPhone 18 lineup globally, but the US market for the iPhone 18 Pro Max will continue using Qualcomm chips, according to updated tech spec sheets.
The C2 modem appears across Apple's new phone roster with geographic restrictions. The iPhone Duo and iPhone 18 Pro will use Apple's custom modem worldwide, marking expanded adoption of the company's silicon strategy.
The iPhone 18 Pro Max represents an exception: only US models will retain Qualcomm modems, while international variants get the C2. This split likely reflects ongoing regulatory or carrier compatibility requirements in the US market.
The move continues Apple's multi-year effort to reduce dependence on Qualcomm. The company has gradually introduced its own modems across the iPhone lineup, with the C2 representing a significant step in that transition.
Apple's custom modem development aims to optimize performance for its chips while potentially reducing component costs. However, the US-only Qualcomm exception suggests the company still faces hurdles in fully replacing the industry standard in certain markets.
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