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The iPhone 17 series is still months away from launch, but leaks about the iPhone 18 series have already surfaced. A prominent analyst predicts that Apple’s second-generation modem (C2) will debut in the iPhone 18 Pro and iPhone 18 Pro Max in 2026.

Apple’s Transition to In-House Modems

  • Apple introduced its first in-house modem, C1, with the iPhone 16e, designed for faster and more reliable 5G connectivity.
  • Jeff Pu of GF Securities expects Apple to integrate the C2 modem in iPhone 18 Pro models next year.
  • Bloomberg’s Mark Gurman also reported that Apple is developing the C2 modem for its premium iPhones in 2026.

Apple’s Modem Strategy for Future iPhones

  • Apple was considering using C1 in the iPhone 17 Air, but this plan might be canceled.
  • It is unclear whether Apple will use C1 in non-Pro iPhone 18 models while keeping C2 exclusive to Pro variants.
  • The company may continue relying on Qualcomm’s 5G modem for select high-end models

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C1 Modem Limitations and Future Updates

  • The C1 modem lacks mmWave support, which can result in slower internet speeds compared to Qualcomm’s modems.
  • A refreshed C1 version with mmWave support is reportedly in the works.
  • Apple’s shift to in-house modem technology aims to reduce dependency on Qualcomm and improve control over 5G performance.