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For people just entering, SMS 2-factor authentication is only one flavor of 2-factor authentication, and one known to be less secure.
If you have the option, you should use a 2-factor app, of which there are many.
@flengyel I use a TOTP app.
But if you know what TOTP is, you're already ahead of the person who needs to hear the message that SMS 2FA is not good.
@WomanCorn I use Yubico keys. Would rather use TOTP than an app, since I despise my cellphone. At least TOTP works with BitWarden, which incarcerates passwords in their cells in almost humane conditions. Almost.