Apple's C2 5G Modem Expected to Debut in iPhone 18 Pro Models in 2026

The second-generation modem aims to address limitations of the C1 by adding mmWave support and improved efficiency.

Apple's first in-house 5G modem, the C1, debuted in the iPhone 16e, offering strong performance but lacking mmWave 5G support.
The iPhone 17 Air, expected later this year, is rumored to feature the C1 modem, while other iPhone 17 models are likely to continue using Qualcomm modems.
Analysts report that Apple's second-generation C2 modem is in development and is expected to launch with the iPhone 18 Pro models in 2026.
The C2 modem is anticipated to support mmWave 5G, improve efficiency, and introduce advanced features like carrier aggregation.
Apple has extended its 5G modem supply agreement with Qualcomm through 2027, signaling a gradual transition to fully in-house modem technology.