I have a question/suggestion as to why Twitter doesn’t allow the login verification option for either Text or Google Authenticator? I wouldn’t think it’s too difficult to implement and would take a load off of Twitter’s servers for having to send out text messages and them possibly not getting sent at all.
Thanks for the suggestion. These forums are for the API and platform rather than for consumer-facing features like this, but I’ll be sure to pass it along!
(As an aside, you can of course enable 2FA (using SMS) on Twitter - I encourage you to do so! - and I myself use e.g. Duo to manage my other 2FA logins on Google, Amazon, GitHub etc)