AT&T and Frontier have let phone networks fall apart, Calif. regulator finds

report was written in April 2019 but kept private because data submitted by the carriers was deemed confidential and proprietary. The report finally became public after the California Public Utilities Commission (CPUC) ruled in December 2020 that a redacted version had to be released by mid-January.

A summary of the CPUC-commissioned report identified six key findings: