The FBI is currently investigating a significant hack that occurred in 2022 that impacted nearly every AT&T cellular customer. Although no personal information was compromised, experts warn that hackers could potentially discern the identities of individuals communicating with each other, as well as potentially linking phone numbers to additional information. This breach raises concerns about privacy and security for AT&T customers, despite assurances that no sensitive data was accessed. The investigation is ongoing, but the implications of this hack highlight the vulnerabilities within the telecommunications industry and the potential risks associated with cyber attacks. NBC News' Tom Costello provides further insight into this alarming security breach, underscoring the importance of vigilance and proactive measures to safeguard against future breaches.