On June 12, 2025, the U.S. Federal Communications Commission (FCC) issued a final rule on the federal register website to regulate the use of spectrum in the 37 GHz low band and above 24 GHz in mobile radio services. The rule will free up 600MHz of spectrum resources to support flexible fixed/mobile uses, including fixed wireless broadband and the Internet of Things (IoT). The new rules will come into effect on July 14, 2025. Click this link to view the original announcement.

The FCC also issued the Sponsoring Proposal Rules (FNPRM), which mainly involve:

• Stricter emission limits for the Ultra-High Band Flexible Service (UMFUS) in the frequency band above 37 GHz;
• Complementing the Final Rule with Supplemental Provisions;
• Replace the existing coordination mechanism with a dynamic spectrum management system (DSMS);
• Corrected the error of the power flux density (PFD) parameter in the UMFUS technical rules.

Click this link for the original FNPRM proposal, which is open for public comment until July 14, 2025.