Overview of 3.7 GHz Band Allocation
Official United States FCC allocation rules under 47 CFR Part 27 now expand the 3.7 GHz Service band. Specifically, the Federal Communications Commission (FCC) expanded this spectrum from 3700–3980 MHz to 3700–4140 MHz. As a result, this update changes device testing and equipment approval timelines. Additionally, it updates network deployment rules for wireless systems.
Technical Testing and Power Limits
For lab testing, the FCC increased maximum RF power for mobile transceivers to 2 Watts EIRP. However, fixed base stations in the 3700–4140 MHz range must follow strict out-of-band emission limits. These limits protect aircraft radio altimeters operating in the 4200–4400 MHz band. Furthermore, base station antenna heights in the 3980–4140 MHz range cannot exceed 450 feet AGL.
Under amended § 27.75, mobile devices seeking Equipment Authorization on or after December 31, 2030, must support 3700–4140 MHz. Conversely, devices authorized before December 31, 2030, receive grandfathered status if they cannot update. Therefore, operators can keep these older devices in service without recertification.
Regulatory Governance and Cable Security
In addition, rule updates grant delegated authority to the Office of International Affairs (OIA). These rules also establish clear security mandates for submarine cable infrastructure. Specifically, regulators defined principal equipment and wet infrastructure. Moreover, the rules exclude equipment on the FCC Covered List and block leasing deals with foreign adversaries.
To maintain compliance with United States FCC allocation rules, explore our Regulatory Intelligence Service: Entirety Regulatory Intelligence Service.
Impact Assessment
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Technical Standards? ❌ No
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Type Approval & Market Access? ✅ Yes
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Imports, Customs, Trade, or Market Surveillance? ❌ No
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Spectrum Management? ✅ Yes
