Instead, the FCC intends to issue an enforcement advisory to the broader industry, reminding carriers "of the penalties associated with filings that violate federal law. Further Reading Verizon lied about 4G coverage-and it could hurt rural America, group says. In a call with reporters, a senior FCC official said that commission staff was unable to determine whether the carriers' exaggerations were deliberate. The official said that the investigation did not establish a clear violation of a specific rule. The FCC official said that maps submitted by carriers were based on industry-standard propagation models and that the FCC's own tests made it clear that those industry models do not reflect on-the-ground experience. FCC officials conducted drive tests to determine whether the providers' reported coverage matched reality. The FCC staff report said:.