Apple is reportedly testing its second-generation C2 modem for future iPhone models, according to a reliable leaker who shared this information via a private account on X, as reported by MacRumors. The C2 modem is identified as C4020 within Apple. While no additional details were given, the confirmation of its existence aligns with Apple’s practice of developing new iPhone chips several years in advance.
Apple tests second-generation C2 modem for future iPhones
The forthcoming C2 modem aims to deliver faster and more reliable 5G connectivity and could offer enhanced power efficiency. In comparison, Apple’s current C1 modem featured in the iPhone 16e has been touted as the most power-efficient modem to date, enabling the device to achieve the longest battery life of any 6.1-inch iPhone, surpassing even the more advanced iPhone 16.
Speed tests for the C1 modem are still awaited, but early indicators suggest it will perform slower than Qualcomm’s latest Snapdragon X75 modem, utilized in other iPhones. Apple’s chipmaking chief, Johny Srouji, described the C1 modem as just the “start,” suggesting the C2 modem will progress further in this technological journey.
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Transition to in-house Wi-Fi chips
The iPhone 17, anticipated for release later this year, is expected to highlight Apple’s advancements in chip manufacturing. Analyst Ming-Chi Kuo announced that Apple will expedite the transition from Qualcomm’s modems to in-house chips, with plans for all new iPhone 17 models in the latter half of 2025 to feature Apple’s own Wi-Fi chips. In contrast, the slim iPhone 17 model will be equipped with Apple’s C1 modem chip.
Kuo noted that this switch to Apple-designed Wi-Fi chips is not solely a cost-saving measure but also aims to “enhance connectivity across Apple devices.” The implications of this statement are still unclear, although it may relate to predictive computing or enhancements for Apple’s smart home ecosystem. Rumors suggest a significant refresh of the Apple TV could further position it as a central hub within this ecosystem.
Apple’s previous statements about the C1 modem highlight its role in improving battery performance for the iPhone 16e. The upcoming Wi-Fi chip may also emphasize the company’s ability to finely tune its hardware according to user needs. As Apple increasingly assembles complete control over the components in its devices, the iPhone 17 is expected to mark another step towards this goal.
While Apple transitions to its own modem and Wi-Fi chips, it’s important to note that these innovations are often built on existing patents. For instance, even though Apple has begun replacing Qualcomm modems in various iPhone models, a patent agreement allows Qualcomm to receive royalty payments despite not manufacturing the C1 modem.
On the day of Kuo’s announcement, shares of Broadcom and Qualcomm fell about 1%, while Apple’s stock increased by half a percent.
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