The C2 modem is expected to build on the foundation laid by the C1, which powers the iPhone 16e and the upcoming iPhone 17 Air with efficient sub-6GHz 5G connectivity. While the C1 has proven its worth in terms of power efficiency, it lacks support for mmWave 5G, the ultra-fast spectrum that delivers top speeds in dense urban areas. The C2, however, is set to close this gap. Gurman reports that the new modem will include mmWave support, potentially pushing theoretical download speeds to 6 Gbps—surpassing the C1’s 4 Gbps ceiling and rivaling Qualcomm’s latest offerings.
This upgrade could mean faster data transfers for Pro users, particularly in regions where mmWave infrastructure is established, like parts of the U.S. It’s a practical boost for those who rely on their iPhones for bandwidth-heavy tasks—think 8K video streaming or rapid cloud syncing—making the Pro models even more appealing to power users.
Why the Pro Models?
Apple’s strategy appears to be a phased rollout of its modem technology. The C1 debuted in the budget-friendly iPhone 16e and is expected to feature in the iPhone 17 Air later this year, both of which prioritize efficiency over cutting-edge speed. The C2’s debut in the iPhone 18 Pro lineup suggests Apple is reserving its most advanced connectivity for its flagship devices. Meanwhile, the iPhone 17 Pro and Pro Max, due in September 2025, will stick with Qualcomm modems, as Apple’s agreement with the chipmaker extends through 2026.
This staggered approach allows Apple to refine its modem tech in lower-stakes devices before integrating it into the high-performance Pro series. It’s a pragmatic move, ensuring stability while the company perfects its in-house solution.
Beyond Speed: Power and Future Plans
The C2 isn’t just about faster downloads. Improved power consumption is another key focus, according to Gurman. This aligns with Apple’s broader push for efficiency across its ecosystem, potentially extending battery life in the iPhone 18 Pro models despite the added demands of mmWave. Looking further ahead, Apple is already developing a third-generation C3 modem, expected in 2027, which aims to outstrip Qualcomm’s modems in both performance and AI-driven features.
This trajectory underscores Apple’s long-term vision: a fully integrated system where its modems, Wi-Fi chips (like the Wi-Fi 7 chip rumored for the iPhone 17), and A-series processors work in harmony. Such synergy could enhance connectivity across Apple devices, from iPhones to future cellular-enabled Macs—a possibility Gurman has hinted at for 2026.
What It Means for Users
For tech enthusiasts and casual users alike, the C2 modem signals Apple’s commitment to controlling its hardware destiny. While the average consumer might not notice the shift from Qualcomm to Apple silicon mid-call, the practical benefits—faster speeds, better battery life, and tighter ecosystem integration—could make a tangible difference. The iPhone 18 Pro models, expected to launch in September 2026, might not reinvent the wheel, but they’ll likely refine it with this under-the-hood upgrade.
As Apple continues to test the C2, the tech world watches closely. If successful, this modem could solidify Apple’s reputation as an innovator not just in design, but in the nuts and bolts of connectivity. For now, iPhone fans have the iPhone 17 series to look forward to this fall—Qualcomm-powered Pros included—while the C2 waits in the wings for its 2026 spotlight.
