From PC Mag: It looks like Twitter has dropped support for text message two-factor authentication (2FA) using Google Voice numbers.
According to 9To5Google(Opens in a new window), trying to confirm a virtual Google Voice number using 2FA results in an error message that says: “We cannot currently register this phone number.” And when users attempt re-add a Voice number to an account after removing it, Twitter says, “This phone number can’t be registered. Try signing in with email instead.”
The error messages did not appear when the change was first implemented last week, with users instead left with a blank box that did not explain the error, 9To5Google reports.
The move could lead to accounts that are authenticated using Google Voice numbers being logged out. For people logged into Twitter on another device, it’s possible to turn off “Text message” 2FA from Settings > Security and account access > Security > Two-factor authentication.
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