Apple's improved C1 modem: More speed and efficiency

Apple is continuously working to improve its hardware and become more independent of external suppliers. A central part of this strategy is the development of its own modems. While the C1 modem, which was introduced with the iPhone 16e, is already considered a milestone, there is still room for improvement in terms of speed and network technology. Well-known industry analyst Ming-Chi Kuo is now reporting that Apple is working on a revised version of this modem, which is scheduled to go into mass production in 2025. This new version should not only be more efficient, but also support mmWave 5G. This could mean a decisive improvement for users who rely on faster data connections. But what concrete advantages does the next generation of Apple modem bring?

Cellular technology is one of the most important factors for the performance of a smartphone. While Apple has previously relied on modems from Qualcomm, the company is increasingly relying on its own developments. The C1 modem in the iPhone 16e is the first cellular module developed by Apple that is characterized by high energy efficiency. However, support for mmWave 5G, which offers enormous speed advantages, especially in large cities and busy areas such as airports or stadiums, is currently missing. According to Ming-Chi Kuo, Apple is now planning a improved Version of the C1 modem that is designed to address exactly this problem. The challenge lies not only in the implementation of mmWave, but also in optimizing power consumption.

The C1 modem: Apple's first big step into modem development

Apple has taken an important step with the introduction of the C1 modem in the iPhone 16e. Up until now, iPhones have used modem hardware from Qualcomm, but in the long term Apple wants to become independent. The C1 modem offers a solid basis and scores particularly well with its high energy efficiency. The company says that it is the most energy-efficient modem ever installed in an iPhone. This means that the iPhone 16e has the longest battery life of any 6.1-inch model to date. One disadvantage of the first generation, however, is the lack of mmWave technology. This means that users are denied the highest possible 5G speeds in certain environments where mmWave is available. However, Apple has already announced that the C1 modem is just the beginning and will be improved with each new generation.

Apple: The new C1 modem in the iPhone 16e is just the beginning

The revised version: Improved speed and mmWave support

Ming-Chi Kuo reports that Apple is developing an improved version of the C1 modem that will go into mass production. The most important innovations are:

Support for mmWave 5G: This technology enables significantly higher speeds in certain networks and improves connection quality in densely populated areas.
Optimized power consumption: One of the biggest challenges in modem development is to combine high performance with efficient power management. Apple wants to achieve this with the new version of the C1 modem.
General performance improvements: In addition to implementing mmWave, Apple is working to further optimize connection stability and speed.

Technical details of the new C1 modem

According to Kuo, the new modem is based on an advanced manufacturing technology, but Apple is sticking with a 4/5nm structure for the time being. Unlike with processors, switching to an even smaller manufacturing process such as 3nm does not bring any significant advantages for the transmission speed. The most important technical specifications:

Baseband chip: 4/5nm process
Low Frequency/Sub-6 Transceiver (TRx): 7nm
Intermediate frequency (IF) TRx: 7nm
Power Management IC (PMIC): 55nm

Kuo emphasizes that Apple is primarily working on stable performance with low energy consumption. Since mmWave is particularly energy-hungry, the focus is on finding a balance between speed and battery life.

Which Apple devices will receive the new modem?

It has not yet been officially confirmed in which devices the revised version of the C1 modem will be used. However, there are a few likely candidates:

iPhone 17e: A possible upgrade for the cheaper model of the iPhone 17 series, expected in 2026.
iPhone 18 (standard model): The new modem could appear in the regular iPhone 18 models in 2026.
iPads with 5G support: According to Wayne Ma of The Information, Apple plans to equip at least one iPad model with the new modem technology.

There is also speculation about a future C2 modem, possibly intended for the iPhone 18 Pro models in 2026. Mark Gurman of Bloomberg believes that Apple will take another big step towards its own modem hardware with the C2 version.

Why is mmWave 5G so important?

The main advantage of mmWave is the significantly higher transmission speed and lower latency. This technology is particularly suitable for places with high network usage such as stadiums, airports or city centers. While the C1 modem currently installed in the iPhone 16e uses the slower sub-6GHz technology, mmWave enables download speeds in the gigabit range. However, there are also limitations: mmWave has a shorter range than sub-6GHz 5G and is currently only being extensively rolled out in some regions. Nevertheless, it is an important step forward for mobile data communication, especially for users who rely on high bandwidths.

Apple's path to independence in mobile technology

Apple is actively working to further develop its mobile technology and become more independent of Qualcomm. With the improved version of the C1 modem, an exciting innovation is imminent that integrates mmWave 5G into Apple's own modem hardware. In addition to faster transmission rates, the focus is on optimized energy consumption so as not to affect battery life. It remains to be seen which devices will receive the new modem first. It is likely that it will be used in the iPhone 17e or in the standard models of the iPhone 18 series. iPads with 5G could also benefit from this development. With the planned introduction of the improved C1 modem and the possible further development to the C2 modem in 2026, Apple is continuing its course of controlling mobile technology itself. For users, this means better integration of hardware and software in the long term, as well as possibly more stable connections and longer battery life. (Image: Apple)