In Australia (and many other countries), we need to KYC when we get a new mobile plan. This makes sense: you can do a lot of criming with a 'dark' phone number.
> In September 2022, Australian telecommunications company Optus suffered a data breach that affected up to 10 million current and former customers comprising a third of Australia's population. Information was illegally obtained, including names, dates of birth, home addresses, telephone numbers, email contacts, and numbers of passports and driving licences.
Predictably enough, then...
https://en.wikipedia.org/wiki/2022_Optus_data_breach
> In September 2022, Australian telecommunications company Optus suffered a data breach that affected up to 10 million current and former customers comprising a third of Australia's population. Information was illegally obtained, including names, dates of birth, home addresses, telephone numbers, email contacts, and numbers of passports and driving licences.