The Story So Far: C1 vs Qualcomm
Apple began its custom modem journey in 2024 with the C1 chip in the iPhone 16e. According to an extensive Ookla study (September 2025), the C1 delivered excellent performance in areas with weak signal, but fell behind in speed on networks with advanced 5G. On T-Mobile in the US, the iPhone 16 (Qualcomm) achieved 317 Mbps median download speeds, while the iPhone 16e (C1) topped out at 252 Mbps 📶.
The reason? The C1 supports carrier aggregation across only 3 carriers, while Qualcomm supports 4. Additionally, the C1 lacked mmWave 5G completely — the fastest flavor of 5G with speeds exceeding 1 Gbps.
Advantage #1: mmWave 5G for the First Time
According to Taiwan's Commercial Times and MacRumors, the C2 modem will support full mmWave 5G. Theoretical multi-Gbps speeds in urban centers, airports, stadiums, and shopping malls.
For European users, mmWave support is equally important in the medium term, as carriers across the continent continue investing in 5G infrastructure, with mmWave deployments expected in major cities over the coming years 🇪🇺.
Advantage #2: Drastically Lower Power Consumption
In current iPhones, Qualcomm's modem sits as a separate chip that draws significant power. Apple plans to integrate the C2 modem far more tightly with the A20 SoC, using TSMC's N2 2nm process. Fewer data paths between chips, less heat generation, and significantly lower power consumption 🔋.
In practical terms: 30-60 extra minutes of battery life per day — a noticeable upgrade for users who rely heavily on mobile data.
Advantage #3: Smaller Footprint, More Room Inside
Full modem integration into the Apple SoC package means less physical space needed inside the iPhone. That freed-up space is used for a larger battery (5,100-5,200mAh on Pro Max), better cooling (vapor chamber), or a more sophisticated camera module 📷.
Advantage #4: NR-NTN Satellite Connectivity
The C2 modem will support NR-NTN (New Radio Non-Terrestrial Networks) — meaning 5G satellite connectivity. This means the iPhone 18 Pro could offer full internet access via satellite, supplementing 5G networks where they can't reach 🌍.
Apple plans to allow third-party apps to use the satellite connection, with Apple Maps and Photos working over satellite too. Ideal for travel, camping, or remote areas without cellular coverage ⛰️.
C1 vs C2: Quick Comparison
- C1: No mmWave, 3 carrier aggregation, iPhone 16e and 17 Air
- C1X: 2× faster than C1, iPhone 17
- C2: mmWave 5G + NR-NTN, 4+ carrier aggregation, iPhone 18 Pro & Fold
Which Models Get the C2?
The high-end models will receive the C2: iPhone 18 Pro, iPhone 18 Pro Max, and the iPhone Fold. The base models (iPhone 18 and iPhone Air 2) are expected to continue with the C1X or an upgraded variant.
"Apple's goal is clear: by 2028, no iPhone will use a Qualcomm modem. The C2 is a critical step in that direction."
— Ming-Chi Kuo, TF International SecuritiesWhat This Means for You
For the average user, the C2 modem means: faster 5G in cities, better connectivity in poor signal conditions, longer battery life, less heat during data-intensive use, and satellite connectivity where there's no signal. Apple is doing what it does best — controlling the entire hardware stack for a refined experience 🏆.
