A new study by RootMetrics claims that T-Mobile’s service is the absolute worst. The company, having travelled 220,000 miles throughout all 50 states in an attempt to gauge real-world carrier service, claims Verizon is the best around. They stopped at over 6,300 indoor locations, and collected a staggering 4.6 million samples during the second half of 2013 for the study as well.

This is part of RootMetric’s first annual “National RootScore Report”, which aims to gauge carrier performance by hitting the pavement each year. Verizon took an overall score of 89.7 (out of 100, naturally), while AT&T had a score of 86.2. Sprint had a 68.2 on the test, while T-Mobile came in last with 64.3 overall. The scores here represent “good overall coverage and a good consumer experience.”

When it came to speed, AT&T took the crown with a score of 88.7, edging out Verizon’s 88.5. T-Mobile has a score of 74.3, and Sprint was a distant third with a 65.8 when it came to speed. Reliability scores were similarly slanted, with Verizon scoring a 89.8 to AT&T’s 84.9. Sprint scored a 65.2, while T-Mobile ranked last again with a 57.1.

As expected, T-Mobile CEO John Legere took to twitter to denounce the findings, issuing a snarky congratulations to the competitors. He claims the results are “out of date” and “slanted”. He had no issue when RootMetrics found their LTE network to be far and away the fastest in Dallas last year, though, so we’re going to have to declare shenanigans on Legere. A recent pickup of 700MHz spectrum from Verizon should help T-Mobile with coverage and reliability, but they’ll need a different solution to calm their CEO down.