https://www.bleepingcomputer.com/news/security/google-fi-data-breach-let-hackers-carry-out-sim-swap-attacks/

Google Fi, Google's U.S.-only telecommunications and mobile internet service, has informed customers that personal data was exposed by a data breach at one of its primary network providers, with some customers warned that it allowed SIM swapping attacks.

Google sent notices of a data breach to Google Fi customers this week, informing them that the incident exposed their phone numbers, SIM card serial numbers, account status (active or inactive), account activation date, and mobile service plan details.