It’s not just you or your smartphone. It’s Denver.

The city once again ranked among the slowest cities nationwide for 4G wireless speeds, according to a new report by OpenSignal, a firm that measures mobile network performance and speeds.

Denver placed 33rd out of 35 cities and posted an average download speed of 13.27 megabits per second. That was a couple megabits above last place Las Vegas, but well below leader Minneapolis, which posted an average speed of 21.5 mbps.

Last year, Denver came in last place for mobile data speeds in the U.S. based on two reports.

And the reasons are the same as before, said Kevin Fitchard, an OpenSignal analyst.

“Denver’s speeds are slower simply because operators don’t have enough LTE capacity to support faster speeds,” Fitchard said.

In most cities, one or two mobile services tend to do much better than the rest of the competition, which helps push up the city’s overall average speed. Not so for Denver, where all four major carriers are “equally slow,” at least for the most part, he said.

In OpenSignal’s August test of 4G speeds in Denver, Sprint won the race with 15.01 mbps. Back in February, T-Mobile was the leader at 13.94 mbps.

“One likely explanation is that no individual operator in Denver has enough spectrum to build a high-capacity LTE network,” Fitchard said. “If an operator was able to acquire a larger hunk of spectrum they could build a faster network. Another reason might be limitations in network construction. If Denver has a lot of tower restrictions, for instance, operators might not be able to build a sufficiently dense enough network to support fast speeds for Denver’s population.”

While Minneapolis tops the U.S. charts, that’s nothing compared Singapore and South Korea, Those countries took OpenSignal’s first and second spots in the global LTE test with Singapore 46.64 mbps and South Korea at 45.85 mbps.