Up until now, Verizon has ridden its millimeter wave-based 5G coverage to the top of the list for 5G network performance.

That’s a pretty sizable shift, especially since Ookla rated Verizon as the best-performing 5G network as recently as the third quarter of 2020, when the carrier’s speed score was a lofty 792.5.

For the fourth quarter, though, AT&T’s 5G speed score rose to 75.59, while Verizon plummeted to 67.07.

That kind of 5G covers more people — Verizon now says its 5G network reaches 230 million people — but it’s also much slower than mmWave.

And more people getting slower speed on a network will drive down the speed score, according to Ookla.

With this overall drop in speed, Verizon now sits at the bottom of the 5G pile behind T-Mobile and Sprint (both of which were measured separately despite their 2020 merger).