I admire your confidence and hope you are right.
I am curious, is QR code verification currently universal to all countries?
Also, suppose I am on holiday in Italy, which is one of the many countries that requires ID registration to buy or use a SIM. I’m in Italy for only a week and buy a SIM there, which is tied to my ID.
While I’m there I use my Italian number to create an “anonymous” Google account. Upon creating my Google account, I immediately enable 2FA via authentication app and YubiKey, and save my recovery codes. I am able to log into my Google account without SMS verification.
I go back to my country, and keep using my Google account without ever being prompted to verify my number. Because I don’t live in Italy, my Italian number quickly gets reassigned.
I keep using my Google accounts for months and years, without every needing to verify my number.
Can Google trace the account back to my real identity from the Italian number I used?
Do phone network companies or governments keep a record of all the people who have owned the same number?
This is something worth investigating in the country that you live in. I would like to believe that if I owned a phone number for just a couple of months before it was assigned to someone else, Google would not be able to identify me.
I know for a fact that Google does keep a record of all the phone numbers you have used with them. However, they will generally not let you verify your account with a number you don’t own anymore. I know lots of people who forget to update their number with Google when they change it.