Fuite de données de plus d'un milliard de comptes Facebook : The target is primed for a SIM-swapping attack, where thieves trick or bribe employees at mobile phone stores into transferring ownership of the target's phone number to a mobile device controlled by the attackers.

Phone numbers were never designed to be identity documents, but that's effectively what they've become. It's time we stopped letting everyone treat them that way.

https://krebsonsecurity.com/2021/04/are-you-one-of-the-533m-people-who-got-facebooked/