Alice (telco) at one point required the password I used on the website to identify me on the phone. Quite sensible as authentication/identification (though it requires the password to be stored in plain text somewhere, something I don’t really care about) in theory and reading out aPua6EG8H0nB6UIxOwsQQeVYUF71NRQ9AkBqg4rujU8vAcLMnG is not all that hard.