The latest announcement, a deal between T-Mobile and Alaskan carrier GCI, will allow T-Mobile users in Alaska to roam on GCI's new 5G network in Anchorage that was turned on in April. GCI users will be able to take advantage of T-Mobile's 5G footprint when traveling in other states.
A regional provider of internet, TV and wireless services, GCI uses a combination of low-band and midband spectrum to offer 5G with download speeds that it claims are five times faster what it was able to offer with 4G LTE. Like T-Mobile, GCI uses the 600Mhz band as part of its low-band 5G network allowing for easier roaming between the two carriers' respective customers.
Beyond Anchorage, the Alaskan carrier looks to expand its new network to Juneau, Fairbanks and "other fiber-served communities" though it has yet to reveal when those expansions will take place.