Re: can be saved by two factor authentication
"The fact is I don't trust Google having my phone number. "
I have three phone numbers. One of them has never been used for anything other than 2FA, using an elderly webOS phone that is used for nothing else (and wouldn't be much use because HP's servers are turned off.) One of them is for things like Microsoft installs, using my other old phone. And one of them is actually given out to people. But nowadays I'm trying to use Yubico where possible for 2FA.
I regard PAYG SIMs as the cost of security.