No Phone Number Required for 2 Factor Authentication
Twitter will now let you use two-factor authentication (2FA) without having to give your phone number. This requirement made more sense when Twitter relied on SMS to send users their six-digit 2FA codes. But now, Twitter allows users to use authentication apps or security keys.
SMS method also leaves the account vulnerable to SIM swapping attacks, even Twitter CEO Jack Dorsey’s account was hacked due to this. Twitter also recently admitted to unintentionally using people’s phone numbers for advertising purposes. Authentication apps are more secure, and you can use them without having to give any more personal details to Twitter than you absolutely need to.
If you’ve given Twitter your phone number and you want to delete it, then head into settings in the app or on Twitter’s website, and then click into the “Account” menu. From here, tap your phone number, and then select the delete option. If you’re currently using SMS as a 2FA method then you’ll be warned that deleting it will turn it off, so be sure to set up an alternative 2FA method such as an authentication app to use in its place.