Verizon, Sprint, T-Mobile and AT&T have all made very clear that they are either already offering 5G services or will be shortly. But the nation’s smaller and regional wireless network operators don’t seem content to be left behind.

Wisconsin’s Cellcom, a subsidiary of Nsight, said last week it partnered with Ericsson to demonstrate 5G in Green Bay. “We are building the path to 5G now, deploying 5G-ready radios and installing fiber to carry the increased data traffic,” said Cellcom CEO Mark Naze in a release.

Cellcom isn’t alone. For example, U.S. Cellular also tested 5G technology in 28 GHz with Ericsson in Wisconsin in 2017. And in August of this year, the company’s CEO said U.S. Cellular also tested 5G in 3.5 GHz spectrum and will next test 5G using 3GPP standardized equipment.

“We are also conducting work to understand the economic opportunity of various 5G use cases represent for us in our markets,” explained CEO Kenneth Meyers, according to a Seeking Alpha transcript of his remarks on U.S. Cellular’s most recent conference call. “Understanding these use cases is an important in determining what spectrum bands our carrier needs and critical when evaluating upcoming spectrum auction opportunities.”

C Spire too is moving forward on the 5G front. It conducted a 5G R&D test with Phazr last year and earlier this year launched a 5G-branded fixed wireless service with equipment from Mimosa and Siklu running in unlicensed 5.8 GHz spectrum.