Technology sometimes can cause huge problems. Consider social media advancing the Republican led insurrection at the US Capital to overturn an election.
There have not yet been proven reports of harmful interference due to wireless broadband operations internationally, although this issue is continuing to be studied. In the United States, there has been wireless broadband deployment in the 3.65-3.7 GHz band since 2007. The FCC started a proceeding to authorize mobile broadband service in the 3.55-3.7 GHz band in December 2012 and adopted final rules in April 2015 and October 2018. Commercial deployment started in September 2019, with no known issues for altimeters to date.
Regarding the 3.7-4.2 GHz, the FCC first sought comment on introducing mobile broadband into the band in 2017. In March 2018, the MOBILE NOW Act directed the FCC to evaluate the feasibility of commercial wireless deployments in the 3.7-4.2 GHz range. The FCC started a proceeding in May 2018 and adopted the C-band Report and Order authorizing flexible use of the 3.7-3.98 GHz band in March 2020. In February 2021, the FCC completed an auction of the 3.7–3.98 GHz frequency band and subsequently issued licenses to several wireless network providers subject to license conditions.
