T-Mobile US is the latest domestic wireless operator to tout its full-year 5G success, proclaiming it has met a mid-band coverage goal ahead of schedule and teased further mid-band spectrum support.

The carrier said its “extended range” 5G network now covers 323 million people, or roughly 97% of the U.S. population. That network taps into T-Mobile US’ far-reaching 600 MHz spectrum holdings.

T-Mobile US’ higher speed “ultra capacity” 5G service now covers 260 million people. That network relies heavily on the carrier’s deep 2.5 GHz mid-band spectrum with help from its more limited millimeter wave (mmWave) holdings. The coverage mark was the carrier’s year-end goal, with current plans for that service to hit 300 million customers by the end of next year.

T-Mobile US has access to more than 150 megahertz of 2.5 GHz spectrum across the country. It recently boosted long-term access to that capacity through a $3.5 billion deal with spectrum license holders Channel 51 License Co and LB License Co.

The carrier last month expanded its nationwide 5G standalone (SA) core to run on its extensive and deep 2.5 GHz spectrum holdings, providing the carrier with the ability to aggregate 5G SA spectrum to better support dynamic use cases like network slicing and private wireless.

That mid-band 5G service is also being bolstered by T-Mobile US layering in its 1.9 GHz spectrum resources that had been powering its 3G networks. Parts of that spectrum are still being used to power T-Mobile US’ 2G network that connect older IoT devices and its still running 4G LTE network.

T-Mobile US continues to use some of its 600 MHz spectrum, and all of its 700 MHz, 850 MHz, and 1.7/2.1 GHz spectrum holdings to power its 4G LTE service.

The carrier also noted it “has begun lighting up three-carrier aggregation,” which is a way to combine spectrum channels in different bands to act as a larger transmission pipe. T-Mobile US earlier this year began testing this 5G carrier aggregation capability to combine a pair of spectrum channels in the 2.5 GHz band and a single spectrum channel in the 1.9 GHz band to form a single 210-megahertz channel. Those tests produced download speeds in excess of 3 Gb/s. The carrier plans to expand that capability nationwide.

T-Mobile US’ network update follows similar self-congratulations from rival Verizon.

Verizon last week said it has deployed more than 10,000 virtualized radio access network (vRAN) cell sites across the country, crossing the half-way point toward its 20,000 site goal by 2025. Samsung has been a large part of that vRAN deployment, though the carrier has begun to layer Ericsson vRAN equipment into the mix.

Verizon last week also said it would offer its mid-band powered “Ultra Wideband” 5G service “nationwide” during the first quarter of next year. That network uses the carrier’s C-band spectrum licenses, with the timing stated to be 13 months ahead of its original schedule.