Well, the latest Opensignal study is a little different, adding two more names to America's big three wireless service providers and expanding the scope of the analytics firm's testing to measure the "converged experience" of users subscribed to the same company for both mobile and home internet access.
The all-around winner might surprise you
Based on nationwide tests conducted between January 1 and March 31, 2026, it appears Xfinity customers get more consistent network quality and higher download speeds than those on Verizon, AT&T, T-Mobile, and Spectrum.
The difference is small in two of these categories, but the winner is still (more than) a little surprising. | Image by Opensignal
Also known as Comcast, the cable giant and veteran only entered the wireless landscape in 2017, reaching a modest 7.5 million mobile subscribers around seven years later. That number clearly doesn't qualify Xfinity Mobile as a major rival for Verizon and T-Mobile, each of which boasts well over 140 million wireless customers, but if you already pay Comcast for broadband service, you may want to consider ditching your current mobile network provider.
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Have you ever thought of opting for a smaller carrier like Xfinity Mobile?
Xfinity Mobile plans, mind you, start at... $0 a month for the first year right now, after which you can pay just $30 a month for unlimited data (mobile hotspot included)... as long as you're already an Xfinity Internet user.
How did Xfinity win these battles?
Now that's a more complicated question than you think because this is a mobile virtual network operator (MVNO) that relies entirely on Verizon's infrastructure. As such, you'd probably expect Big Red's customers to get some sort of network reliability and/or speed advantage over those using a Verizon-powered MVNO, but evidently, that's not the case (at least in Opensignal's testing).
Verizon is technically the winner here with its Fiber network, but the FWA service lowers Big Red's average below Xfinity. | Image by Opensignal
Of course, Verizon's biggest problem is its FWA (fixed-wireless access) service, which delivers way lower consistency and inferior download speeds compared to both its own fiber technology and Xfinity's cable network.
All in all, Xfinity only holds a tiny lead over Verizon in "consistent quality", which may not prove very noticeable in real-life use for many users, but its download speed experience advantage is pretty significant (and, frankly, a little shocking), especially compared to Verizon and T-Mobile.
AT&T is the clear upload speed winner
I'm not sure exactly how you can lose the download speed war by nearly 16 Mbps and win the upload speed battle by 61 Mbps (!!!), but AT&T managed to pull that off... while ranking an honorable third in consistent quality, narrowly ahead of T-Mobile and Spectrum.
That's an impressive victory for AT&T's fiber service. | Image by Opensignal
AT&T Fiber subscribers can actually get both the highest upload and download speeds out of all the services analyzed by Opensignal in the first three months of this year, with the AT&T FWA offering ranked dead last as far as download rates are concerned... and consistent quality.
That's a massive gap between two networks run by the same company, which obviously explains why AT&T is pushing its fiber product so aggressively to wireless customers (and vice versa).
T-Mobile is without a doubt today's big loser
And Magenta's FWA service is definitely to blame, producing way lower download and upload speed results than AT&T and Verizon's Fiber offerings, as well as Xfinity and Spectrum's cable networks.
AT&T Fiber is actually the winner as far as download speeds are concerned as well. | Image by Opensignal
While T-Mo's mobile 5G service remains the nationwide velocity champion, the very limited availability and recent release of the "Un-carrier's" own Fiber product made a better overall result in this new report virtually impossible to obtain.
That being said, it still must hurt for T-Mobile to see even Spectrum ranked ahead of it in the download speed and upload speed experience categories. Spectrum Mobile, mind you, is another Verizon-based MVNO with a modest subscriber count of around 10 million as of early 2025.
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Adrian, a mobile technology enthusiast since the Nokia 3310 era, has been a dynamic presence in the tech journalism field, contributing to Android Authority, Digital Trends, and Pocketnow before joining PhoneArena in 2018. His expertise spans across various platforms, with a particular fondness for the diversity of the Android ecosystem. Despite the challenges of balancing full-time parenthood with his work, Adrian's passion for tech trends, running, and movies keeps him energized. His commitment to mid-range smartphones has led to an eclectic collection of devices, saved from personal bankruptcy by his preference for 'adequate' over 'overpriced'.
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