H. Rept. 117-186: Understanding Cybersecurity of Mobile Networks Act, Report to Accompany H.R. 2685, November 30, 2021 [open pdf - 242KB]
From the Purpose and Summary: "H.R. 2685, the 'Understanding Cybersecurity of Mobile Networks Act,' would require the National Telecommunications and Information Administration (NTIA) to examine and report on the cybersecurity of mobile service networks (excluding 5G [fifth generation]) and mobile devices. The report shall discuss, among other things, the degree to which mobile services providers have addressed vulnerabilities; cybersecurity best practices and risk assessment frameworks; and the prevalence and usage of cell site simulators and other surveillance technologies used by adversaries."
H. Rept. 117-186; House Report 117-186
U.S. Government Publishing Office: http://www.gpo.gov/