Once you've configured a security key on a Google account, it's entirely possible to remove phone-number based account recovery -- and strongly recommended for

Once you've configured a security key on a Google account, it's entirely possible to remove phone-number based account recovery -- and strongly recommended for at-risk users. See step 21 et seq. in the Tech Solidarity security guide for people working on political campaigns: https://techsolidarity.org/resources/security_key_gmail.htm https://techsolidarity.org/resources/security_key_gmail.htm For no particular reason, Google does require you to temporarily configure phone-number based recovery while configuring other 2FA options -- but once they're set up, you don't need the phone number anymore.