Apple is reportedly working on a refreshed version of its proprietary C1 modem, addressing a key functionality missing from the current iteration. The original C1 modem, which was first introduced with the iPhone 16e last month, marked a significant step for Apple, as it reduced the company’s reliance on Qualcomm for cellular modem technology. While the C1 modem represents an important advancement, the iPhone 16e, powered by this modem, lacks mmWave support, a feature that allows for faster 5G speeds in certain conditions. However, Apple is now said to be developing a new version of the modem that will include mmWave functionality, potentially offering significant improvements.
According to TF Securities analyst Ming-Chi Kuo, the current C1 modem in the iPhone 16e utilizes a 4nm or 5nm baseband, 7nm low-frequency transceivers, 7nm transreceivers for immediate frequency, and a 55nm Power Management Integrated Circuit (PMIC). This setup supports only sub-6GHz 5G, which is sufficient for most uses but falls short in areas where mmWave support is critical. While Apple claims the C1 modem is the “most power-efficient modem ever,” the lack of mmWave support has been a limiting factor, especially when it comes to download and upload speeds. To address this, Apple is now focused on developing a refreshed version that can handle mmWave frequencies, which could significantly enhance the performance of future iPhones.
The upcoming C1 modem refresh is expected to include new transreceivers and front-end components based on a 28nm node to support mmWave. While this upgrade is technically feasible, Kuo notes that balancing high-performance capabilities with power efficiency remains a challenge. The addition of mmWave support isn’t particularly complex from a technical standpoint, but it requires careful tuning to ensure that power consumption doesn’t increase significantly. Apple will likely focus on maintaining its reputation for power efficiency while delivering faster 5G speeds, particularly in regions where mmWave 5G is available.
While the refreshed C1 modem is still under development, its inclusion of mmWave support is expected to bring a considerable boost to the iPhone’s 5G capabilities, especially in urban areas where mmWave infrastructure is more common. This move further solidifies Apple’s push to reduce its dependency on third-party suppliers like Qualcomm and establish a more independent approach to modem technology. As 5G networks continue to expand and evolve, Apple’s ongoing advancements in this area will play a crucial role in shaping the performance and competitiveness of its future devices.