Report: Apple's C1 Is Just the Beginning of Modem Changes

Apple plans to move away from Qualcomm modems in the Apple Watch while bolstering its new in-house alternatives, according to The Information's Wayne Ma.

Apple 5G Modem Feature
Later this year, Apple plans to eliminate the Qualcomm modem used in the Apple Watch Ultra. Rather than using the C1 modem or another custom Apple chip, Apple plans to switch from using Qualcomm units to MediaTek ones. MediaTek is one of the few companies capable of designing 5G modems.

In 2026, Apple will debut a new custom modem with support for mmWave 5G. The C1 does not have this capability. The modem with mmWave support will be used in iPhones and "at least one iPad." This project has the codename "Ganymede."

The C1 currently falls short of Qualcomm's performance, and the report suggests its direct 2026 successor will be the same. It will not be until a third generation in 2027 that Apple will "finally be able to exceed the performance of Qualcomm's modems." This project is codenamed "Prometheus."

While this information appears to have been sourced independently, it corroborates previous rumors. In December, Bloomberg's Mark Gurman reported that Apple's second-generation 5G modem will add mmWave support and debut in the iPhone 18 lineup in 2026 and come to the iPad Pro by 2027.

He said the second modem will achieve theoretical download speeds of up to 6 Gbps, compared to up to 4 Gbps for Apple's first modem. He also alluded to Apple's wish for its third-generation modem to surpass Qualcomm's modems in terms of performance and AI features in 2027.

Another Bloomberg report mentioned Apple's plan to transition to MediaTek modems in the Apple Watch. MediaTek's modem adds support for 5G RedCap, a 5G service that's designed for connected devices and wearables that don't need standard 5G speeds. The current cellular Apple Watch models still use 4G LTE.

The Information's full article details Apple's tumultuous relationship with Qualcomm and how it developed the all-new C1 chip.

Related Roundup: Apple Watch Ultra 2
Related Forum: Apple Watch

Popular Stories

ios 18 4 carplay

Apple Upgrades CarPlay in Two Ways

Wednesday March 12, 2025 6:05 am PDT by
The upcoming iOS 18.4 update for the iPhone includes a smaller but meaningful improvement for Apple's in-car iPhone mirroring system CarPlay. Specifically, CarPlay now shows a third row of icons, up from two rows previously. However, this change is only visible in vehicles with a larger center display. For example, a MacRumors Forums member noticed the change in a Toyota Tundra with a...
Apple More Personal Siri Ad

John Gruber Says 'Something is Rotten' at Apple

Wednesday March 12, 2025 7:39 pm PDT by
Daring Fireball's John Gruber today shared some strongly-worded comments about Apple's delayed personalized Siri features. Gruber is a well-known Apple pundit who has been writing about the company for more than two decades. In a blog post titled "Something Is Rotten in the State of Cupertino," Gruber said Apple's credibility has been "damaged" by the delay:Keynote by keynote, product by...
airpods pro 2 gradient

AirPods Pro 3 Launch Now Just Months Away: Here's What We Know

Tuesday March 11, 2025 3:26 am PDT by
Despite being released over two years ago, Apple's AirPods Pro 2 continue to dominate the wireless earbud market. However, with the AirPods Pro 3 expected to launch in 2025, anyone thinking of buying Apple's premium earbuds may be wondering if the next generation is worth holding out for. Apart from their audio and noise-canceling performance, which are generally regarded as excellent for...
Apple Maps vs Google Maps Feature

iOS 18.4 Adds a Highly-Requested Setting to iPhones — But Not in U.S.

Wednesday March 12, 2025 1:05 pm PDT by
iPhones are finally getting a much-requested setting, but availability is limited. The upcoming iOS 18.4 update introduces an option to set a default navigation app, other than Apple Maps, but unfortunately this new setting is limited to users in the EU. There, you can now set an app like Google Maps or Waze as your default navigation app on the iPhone by opening the Settings app and tapping ...
iphone 17 pro asherdipps

iPhone 17 Pro Max Rumors Allegedly Refer to 'iPhone 17 Ultra' Model

Friday March 14, 2025 7:56 am PDT by
If you've been following iPhone rumors over the last few years, you may remember reading reports that Apple flirted with the idea of introducing a super high-end "Ultra" model that would either replace its Pro Max device or sit above it in Apple's smartphone hirearchy. These reports appeared in the pre-launch iPhone 15 and iPhone 16 rumor cycles, but ultimately came to nothing. Now though, the...
iPhone 17 Pro Render Front Page Tech

iPhone 17 Pro Machined Parts Leak Reflects Camera Redesign Rumors

Thursday March 13, 2025 3:07 am PDT by
Apple's upcoming iPhone 17 Pro models are expected to feature a significant design overhaul, and a new image apparently taken on an assembly line for the unreleased devices appears to confirm the biggest rumored change. Render of an iPhone 17 Pro model shared by Jon Prosser The iPhone 17 Pro and iPhone 17 Pro Max are rumored to adopt a horizontal camera bar reminiscent of Google's Pixel...
Generic iOS 19 Feature Mock Light

iOS 19 Will Bring Biggest Design Overhaul Since iOS 7

Monday March 10, 2025 12:17 pm PDT by
Apple is planning for a major design overhaul of the iPhone, iPad, and Mac interfaces with the introduction of iOS 19, iPadOS 19, and macOS 16 later this year, reports Bloomberg. The update will "fundamentally change" the look of Apple's operating system, introducing a more consistent cross-platform experience. Apple plans to update the style of icons, menus, apps, windows, and system...
Sad Siri Feature

Kuo: Apple Knows Apple Intelligence is 'Underwhelming' and Won't Drive iPhone Upgrades

Thursday March 13, 2025 9:32 am PDT by
The Apple Intelligence features that Apple introduced with iOS 18 are not pushing people to upgrade their iPhones, Apple analyst Ming-Chi Kuo reiterated today. Apple's recent Siri failures are also going to have an impact on 2025 iPhone shipments, which the market is beginning to realize. As early as last July, Kuo said expectations that Apple Intelligence could drive iPhone upgrades were...
Sad Siri Feature

Kuo: Cook Should Personally Address Siri Apple Intelligence Failure

Thursday March 13, 2025 4:02 pm PDT by
Apple made a major misstep with the way that it handled the delay of Apple Intelligence features for Siri, Apple analyst Ming-Chi Kuo said today. Announcing the delay through a press statement was a bad decision, and Apple should instead have gone through official channels. Kuo referenced the well-known "Antennagate" PR crisis when the iPhone 4 launched in 2010, and the way that then Apple...

Top Rated Comments

sniffies Avatar
3 weeks ago
Imagine if Apple's C1 was the end of modem changes
Score: 15 Votes (Like | Disagree)
formularossa Avatar
3 weeks ago
Hopefully this opens up the possibility of a cellular MacBook Pro!
Score: 11 Votes (Like | Disagree)
Dejesus Avatar
3 weeks ago
Next move. Put C1 on macbooks
Score: 9 Votes (Like | Disagree)
Cirillo Gherardo Avatar
3 weeks ago

Better be. It's half-baked and doesn't support mmWave.
That doesn't make it half baked. No one cares about mmWave. Cellular data hasn't changed meaningfully since we started using 3G. It is still slow, latent, spotty, and expensive. It is still something you use as little as possible, in between hops from one Wi-Fi network to the next. Nothing about 4G or 5G has changed the way that the majority of users treat cellular data.

As such, Apple is on the right track here to completely reboot the concept with more efficient technology so that we can get some kind of short term gain, while they continue to improve speed over time.
Score: 9 Votes (Like | Disagree)
QuarterSwede Avatar
3 weeks ago

That doesn't make it half baked. No one cares about mmWave. Cellular data hasn't changed meaningfully since we started using 3G. It is still slow, latent, spotty, and expensive. It is still something you use as little as possible, in between hops from one Wi-Fi network to the next. Nothing about 4G or 5G has changed the way that the majority of users treat cellular data.

As such, Apple is on the right track here to completely reboot the concept with more efficient technology so that we can get some kind of short term gain, while they continue to improve speed over time.
I agree with the sentiment that mmWave is useless for the vast majority of users and majority of the time.

However, the speed difference between 3G and LTE was absolutely noticeable. Between 5G, not so much, but 5G feels like fiber due to much lower latency and more bandwidth per tower vs LTE (fast but takes longer to connect).
Score: 8 Votes (Like | Disagree)
Cirillo Gherardo Avatar
3 weeks ago

I agree with the sentiment that mmWave is useless for the vast majority of users and majority of the time.

However, the speed difference between 3G and LTE was absolutely noticeable. Between 5G, not so much, but 5G feels like fiber due to much lower latency and more bandwidth per tower vs LTE (fast but takes longer to connect).
Don't quote me theoretical speeds of cellular. That is what carriers do. That is not what real world use is like. Speeds and coverage and latency vary WILDLY. As such, the way people use cellular has not changed.
Score: 5 Votes (Like | Disagree)