Twitter Limits SMS-Based 2-Factor Authentication to Blue Subscribers Only

Twitter has announced that it’s limiting the use of SMS-based two-factor authentication (2FA) to its Blue subscribers.
“While historically a popular form of 2FA, unfortunately we have seen phone-number based 2FA be used – and abused – by bad actors,” the company said.
“We will no longer allow accounts to enroll in the text message/SMS method of 2FA unless they are Twitter Blue subscribers.”