RootMetrics today released its First Half 2015 US Mobile Network Performance Review, which ranks the US carriers based on performance across the country. During its testing, RootMetrics says that it drove 237,506 miles across the US to collect around 6.1 million test samples.

RootMetrics’ overall performance winner for the first half of 2015 was Verizon, scoring a 94.5 out of 100. AT&T scored 91.8, Sprint got 87.5, and T-Mobile finished fourth at 82.0. T-Mobile also finished fourth place in Network Reliability, Call Performance, and Text Performance. However, T-Mo did manage to beat out Sprint and come in third place in the Network Speed and Data Performance categories. RootMetrics notes that T-Mo recorded speeds of 20Mbps or higher in 45 of the 125 markets tested, beating out AT&T’s 11 markets and Sprint’s 0. The fastest median download speed recorded was 33.8Mbps in Akron, Ohio.

RootMetrics expanded on its rankings for T-Mobile, saying that it found Magenta to perform better in metro areas than at national levels. The company also deemed T-Mo a “solid choice” if you primarily use your smartphone in a major urban area. In all, T-Mobile ended up winning 221 RootScore awards, 20 more than it did in RootMetrics’ testing from the second half of 2014.

Unsurprisingly, John Legere had a few things to say about RootMetrics’ report. The outspoken CEO sent out some Tweets saying that “a little road trip is not an accurate network study” and that in the time that RootMetrics conducted its report, T-Mobile expanded its LTE coverage to include 30 million additional people and expanded its 700MHz coverage to more than 135 markets.

That time of year again! Couple guys from @rootmetrics drive around, get paid by carriers to test networks on a single old-generation phone.

— John Legere (@JohnLegere) August 18, 2015

And let’s be real – @rootmetrics can’t keep up with how fast @NevilleRay and team enhances and updates the @TMobile network! #uncarrier

— John Legere (@JohnLegere) August 18, 2015

Legere also touted the recent study done by SpeedTest app maker Ookla that crowned T-Mobile the fastest mobile network in the US. Ookla came to that result after gathering more than 5 million speed tests and averaging the results from users and devices. Legere says that he prefers this type of crowd-funded report rather than one that has a “couple guys from @rootmetrics drive around, get paid by carriers to test networks on a single old-generation phone.”

If you’d like a closer look at the full RootMetrics report, it can be found at the link below.

Source: RootMetrics