At the heart of the system, the C1 (Cellular 1) chip first appears in the iPhone 16e. It is also expected to debut in other Apple devices in the coming months and will likely see use across all or most of the iPhone range by this time next year. Apple calls it “the most power efficient modem ever in an iPhone.”

Phone 17 5G modems will be made by MediaTek, as Apple moves away from Qualcomm. Future iPhones will use Apple's solutions instead.

Apple today announced its first custom cellular modem with the name "C1," debuting in the all-new iPhone 16e. The new modem contributes

Apple on Wednesday formally introduced its first in-house developed 5G modem that will be used in the company's new $599 6.1-inch iPhone 16e smartphone, aimed at the mainstream audience. The modem is the first fruit from Apple's acquisition of Intel's 5G modem business unit six years ago.

Apple says the chip contributes to the 16E’s longer battery life. The company says the phone’s internal design is optimized to support a larger battery, giving it up to 26 hours of video playback. According to Apple’s technical specifications for the iPhone 16E,

However, we can’t say we’re too surprised. Chip development isn’t an overnight endeavor so Apple needs to start work early if they hope to get it ready in time for future re

Apple only just revealed the C1 modem with iPhone 16e on Wednesday, but there's already a rumor about the C2 being tested internally.