Their research showed an increase in operators' combined download speeds after the C-band rollout, with Verizon wireless getting the best performance since the deployment. Verizon won the most licenses in the February 2021 C-band auction. "If Verizon continues to capitalize on their C-band rollout and add additional deployments, we could well see an upset in the U.S. market rankings," Ookla said in its press statement. Earlier this month, Verizon and AT&T were forced to delay the rollout of the C-band spectrum around airports due to interference issues raised by the Federal Aviation Administration. Each month, Ookla collects data from Speedtest users to report the internet speed at their location, and the data from those tests are used to generate their quarterly reports. Although T-mobile did not deploy its C-band technology in the same week as Verizon or AT&T, the company's internet speeds have steadily increased.