T-Mobile has moved early in the race toward 6G spectrum readiness. The carrier asked the FCC for experimental licenses in the 2.7GHz and 4GHz bands. These bands could support future US 6G services within the next few years.
The request covers prototype base stations and devices at six sites. These sites sit at T-Mobile’s headquarters and lab in Bellevue, Washington. The company wants two years of testing, starting in November 2026.
The work focuses on two spectrum ranges. T-Mobile wants 2690MHz to 2790MHz in the 2.7GHz band. It also wants 4800MHz to 4900MHz in the 4GHz band. Both ranges are under study for future commercial use.
This testing matters because midband spectrum remains highly valuable. It offers a strong balance between coverage and capacity. That balance helped 5G networks scale across cities and suburbs. Operators now want similar assets for 6G.
T-Mobile says the tests serve the public interest. Its filing notes that the company will test new equipment “to provide better service” to customers. It also says the work supports efforts to “free up spectrum for 6G.”
However, the path is not simple. Federal users already occupy parts of these bands. The 2.7GHz band supports satellite, radio astronomy, weather, and aviation systems. Any mobile use must avoid harmful interference.
As a result, coordination becomes critical. T-Mobile said it would work with the FAA, NOAA, and radio astronomy officials. These discussions will shape how commercial networks can share or clear spectrum.
The FCC aims to auction the 2.7GHz band in 2028. That would follow an upper C-band auction planned for July 2027. T-Mobile views both opportunities as strategically important.
T-Mobile CEO Srini Gopalan recently highlighted that point. He said the upper C-band and 2.7GHz are “adjacent to holdings that we have,” during a Goldman Sachs event.
That adjacency could help operators expand networks more efficiently. Nearby spectrum can simplify radio planning and device support. It may also reduce deployment complexity over time.
Still, the government faces a demanding timeline. The NTIA is studying several bands for licensed commercial use. These include 1.6GHz, 2.7GHz, 4.4GHz, and 7GHz ranges.
The agency and FCC want faster auction preparation. New guidance now allows auction planning during spectrum studies. Previously, these processes could not run in parallel.
Verizon has also sought approval for 6G testing in the 4.8GHz to 4.9GHz band. That shows broader industry interest in early field validation. Vendors and carriers need real data before standards mature.
For telecom engineers, these tests offer an early signal. 6G planning is moving from theory into controlled field work. The main challenge now lies in coexistence, coordination, and practical spectrum policy.
