iPhone Air Gets Faster and More Efficient C1X 5G Modem, But No mmWave - MacRumors
Skip to Content

iPhone Air Gets Faster and More Efficient C1X 5G Modem, But No mmWave

Before the iPhone Air debuted, rumors suggested that it would adopt the C1 modem chip that Apple first introduced with the iPhone 16e. It turns out Apple had another idea in mind, and the ‌iPhone Air‌ is equipped with a new C1X chip.

iphone air silver
Apple says the C1X modem is up to 2x faster than the C1, while using the same cellular technologies. It is apparently faster than the Qualcomm modem in the iPhone 16 Pro, while using 30 percent less energy. According to Apple, the C1X is the most power-efficient modem in an iPhone.

Apple seems to be referring to sub-6GHz 5G speeds when it says the C1X is faster than the modem in the ‌iPhone 16‌ Pro, because the chip still doesn't support mmWave 5G speeds.

The C1X is limited to sub-6GHz 5G bands, while the Qualcomm modem in the iPhone 17, iPhone 17 Pro, and ‌iPhone 17 Pro‌ Max supports both sub-6GHz and mmWave. Sub-6GHz is the more widespread version of 5G, while mmWave is more limited and is typically found in major cities and urban areas.

The ‌iPhone Air‌ has longer battery life than the ‌iPhone 16‌ despite its thin size, and it also offers better battery life than the iPhone 16e with C1 modem. The ‌iPhone Air‌ lasts for up to 27 hours when watching videos, while the iPhone 16e lasts for up to 26 hours.

Related Roundup: iPhone Air
Buyer's Guide: iPhone Air (Neutral)

Popular Stories

iphone air all colors

iPhone Air 2 Expected to Launch Early Next Year With Five New Features

Friday July 31, 2026 8:25 am PDT by
Apple plans to release a second-generation iPhone Air in the first quarter of 2027, according to Jeff Pu, an investment analyst who covers Apple. In a research note with GF Securities today, Pu said the iPhone Air 2 will have the following five new features compared to the current model:The addition of a second 48-megapixel rear camera — an Ultra Wide lens to complement the existing Fusion ...
TMRS 205 iPhone Air 2 Thumb

The MacRumors Show: iPhone Air 2 - What Changes After a Difficult First Year

Friday August 7, 2026 9:23 am PDT by
The iPhone Air reaches one year on sale next month, and Apple is now closer to launching its successor than it is to the original's debut. On this week's episode of The MacRumors Show, we discuss what's next for the device. Subscribe to The MacRumors Show YouTube channel for more videos The first-generation model has had a difficult run. A KeyBanc Capital Markets survey found virtually no...
iphone 20 anniversary

iPhone 20's Curved Glass Design to Be Made Like iPhone Air

Monday August 24, 2026 5:41 am PDT by
Apple's 20th-anniversary iPhone will be made using the same glass manufacturing process developed for the iPhone Air, according to the leaker known as "Fixed Focus Digital." In a new post on Weibo, the leaker said that iPhone Air manufacturing equipment has been modified to produce more rounded glass components for next year's 20th anniversary iPhone, which has helped to reduce Apple's...

Top Rated Comments

Woodcrest64 Avatar
13 months ago
Total missed opportunity by Apple not to offer the iPhone Air MagSafe Battery Pack Bandoleer with 5 day battery life. 😂



Attachment Image
Score: 31 Votes (Like | Disagree)
13 months ago

I have to hand it to Apple. The iPhone air is an amazing feat of engineering.
When people complain about the lack of innovation, they're definitely discounting how Apple's work in miniaturization and in-house chip design enables these sorts of designs with fewer trade-offs (at least before reviewers tell us otherwise) than initially thought.
Score: 27 Votes (Like | Disagree)
Michael Scrip Avatar
13 months ago
Remember when mmWave was supposed to be the hottest new thing?

But it only worked well if you were standing on the street directly under the antenna?

🤣



Attachment Image
Score: 19 Votes (Like | Disagree)
ipedro Avatar
13 months ago
Energy efficiency was one of the reasons Apple had to abandon Intel and make their own silicon. The same is true for their modems and radios. The iPhone Air would not have been possible with Qualcomm and Broadcom's chips.

I've been a Pro user since there's been iPhone Pro but I'm definitely getting the iPhone Air this time around. It feels like "the future of smartphones today", the direction they're going in just like the iPhone X launched the next generation iPhones at the time.
Score: 19 Votes (Like | Disagree)
Sammy in SoCal Avatar
13 months ago
I have to hand it to Apple. The iPhone air is an amazing feat of engineering.
Score: 17 Votes (Like | Disagree)
13 months ago
There are like only 2 square miles in the entire US where you can actually experience 5G mmwave speeds.
Score: 11 Votes (Like | Disagree)