Twitter announced this week that it will make SMS-based two-factor authentication a paid feature of the service starting March 20, 2023.
“Instead of only entering a password to log in, two-factor authentication (2FA) requires you to also enter a code or use a security key,” a post to the Twitter blog explains. “Instead of only entering a password to log in, 2FA requires you to also enter a code or use a security key. This additional step helps make sure that you, and only you, can access your account. To date, we have offered three methods of 2FA: text message, authentication app, and security key.”
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Starting immediately, Twitter will no longer allow new customers to use 2FA via text message because it’s insecure. And starting March 20, it won’t allow any non-paying customers to use text message-based 2FA; this feature will instead require a Twitter Blue subscription.
Non-subscribers will need to disable text message-based 2FA and enroll using an authentication app or security key instead. You can learn how to do that at the Twitter help center.