
Apple's C1 Modem for iPhone 17 Air: A Mixed Bag on Speed
2025-09-08
Author: Lok
Apple's Bold Move into Modem Technology
Apple is making waves in the smartphone arena by developing its own mobile data modem, aiming to break free from Qualcomm's longstanding dominance. The C1 modem, first introduced in the iPhone 16e, is set to feature in the upcoming iPhone 17 Air.
Speed Tests by Ookla Shine a Light
Speed test giant Ookla has provided key insights into how Apple's C1 modem stacks up against Qualcomm's offerings. If you've ever checked your internet speed, you’ve probably used Ookla’s Speedtest.net, which compiles extensive data from user tests along with device and network information.
The Showdown: C1 vs Qualcomm
Earlier studies painted a somewhat conflicted picture of performance between the iPhone 16, equipped with Qualcomm's chip, and the iPhone 16e with the C1 modem. Initial findings suggested that while the C1 performed well in areas with poor coverage, Qualcomm’s modem excelled in high-speed environments.
Latest Findings: Performance Depends on the Network
According to Ookla’s newest study, the performance of a modem is heavily influenced by the supporting network. Notably, Qualcomm supports four-carrier aggregation, allowing for better performance on networks like T-Mobile, which boasts extensive 5G coverage. In fact, speed tests showed that T-Mobile users on the iPhone 16 enjoyed a median download speed of 317.64 Mbps, far surpassing the 252.80 Mbps achieved by users of the 16e.
Global Performance: C1 vs Qualcomm
On an international level, the iPhone 16 consistently outperformed the iPhone 16e in countries with robust 5G infrastructures, such as China and Saudi Arabia. Nevertheless, in many locations, their speeds were surprisingly similar.
A Focus on Reliability over Raw Speed?
Interestingly, the study highlighted the C1’s better performance under less favorable conditions, suggesting that Apple might be prioritizing consistent connectivity over sheer speed.
Should You Hesitate Before Buying the iPhone 17 Air?
With all these considerations, potential buyers of the iPhone 17 Air may be left wondering about the implications of these findings on their purchasing decision. What do you think—are these speed differences a dealbreaker for you?