SIM Swapping is an extremely deceptive and dangerous type of social engineering attack, involving the takeover of your mobile phone number by the criminal.
What does this scam involve?
Data Gathering: The criminal first collects your personal data (first name, last name, date of birth, PESEL number, etc.) from social media, data leaks, or through phishing.
Impersonating the Victim: With the gathered information, the scammer contacts your mobile operator and, pretending to be you, reports the "loss" or "damage" of the SIM card, requesting a duplicate to be issued.