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Twitter Now Supports Third-Party Apps for Two-Factor Authentication

Earlier today Twitter announced that you'll now be able to use a third-party app (such as Google Authenticator, Authy, or 1Password) for two-factor authentication instead of SMS. The company has updated their support document with instructions on how to set it up here.

This is great news as Twitter was the last service with 2FA that only supported sending codes via SMS. Switching from text messages to 1Password (which I use for one-time codes) was easy: in Twitter for iPad, I went to Settings ⇾ Account ⇾ Security, and enabled the 'Security app' toggle. I then selected to use another app to generate my codes and opened 1Password on my iPhone, where I hit Edit on my Twitter login item and scrolled to the OTP section. Here, I tapped the QR button, scanned the QR code Twitter was displaying on my iPad with the iPhone's camera, and that was it.

Unless you specifically want to receive 2FA codes from Twitter via SMS, you should consider switching to a dedicated authentication app: these codes work independently from carriers and location, and they can be generated offline.