In-Depth Analysis of iPhone 16e’s C1 5G Modem: Fully Replaces Snapdragon Sub-System While Retaining Package Structure

Apple is making bold strides with its custom-designed C1 5G modem utilized in the iPhone 16e, indicating that their ambitions don’t end with the initial version, as reports suggest testing is already underway for a C2 modem. While much remains to be uncovered, detailed disassemblies of the latest $599 device have revealed that the in-house baseband subsystem of the iPhone 16e completely replaces the previous Snapdragon X71 present in the iPhone 16 series. Let’s delve deeper into these noteworthy findings.

Technical Innovations: The C1 Modem’s Design and Efficiency

In previous discussions, we highlighted the remarkable battery longevity of the iPhone 16e, attributed in part to the advanced lithography used in the C1 modem. Leveraging TSMC’s cutting-edge 4nm and 7nm fabrication technologies for the modem and transceiver, Apple’s proprietary solution is poised to offer enhanced power efficiency compared to the Snapdragon X71. Insights from iFixit revealed that components from the Snapdragon X71 are entirely absent from the iPhone 16e, further emphasizing the extent of the C1’s integration.

This shift may clarify the absence of mmWave support within the iPhone 16e. What is particularly noteworthy is that despite the differences, the C1 modem maintains the same package structure as the Snapdragon X71, featuring the integrated 4nm modem alongside the DRAM. This design choice not only optimizes space but also enhances overall efficiency. However, it should be noted that the 7nm transceivers are not housed within the same package as the modem, raising questions about this design decision. Speculations abound that Apple may consolidate these components into a single package in future iterations.

The development journey of the C1 modem, taking years to materialize even for a company with extensive chipset design expertise, likely involved numerous challenges that are yet to surface. As more information regarding the baseband chip emerges, we encourage our readers to stay tuned for updates in the upcoming weeks.

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