How to Enable 2FA on Twitter via Google Authenticator
Twitter announced recently that only those with Twitter Blue subscription will be permitted to use SMS 2FA to protect their accounts.
Fine.
Then tick the "Authentication app" box.
Click "Get Started" and a QR code appears.
2. On your phone, head to the App Store and download Google Authenticator.
2. Tap the "+" button at the bottom right.
Tap "Scan a QR code" and a camera appears. Scan the QR code on Twitter.
Then you'll see "Twitter (your account)", and a 6-digit number. This 6-digit number will CONTINUOUSLY change, using random combination of numbers. So by the time you're reading this article, "551 882" has been long expired.
3. Head back to Twitter and click "Next."
4. Enter the 6-digit number (if the number is about to expire, wait a few seconds until the new set appears).
Once the 6-digit number you entered matches the number on your Google Authenticator App, you are authenticated.
Click on "Get Backup Code." What if you accidentally erase your phone and can't get access to Google Authenticator? This backup code can authenticate you.
Put it in the same place where your passport and other important documents live.
Because you are the only person who has access to your phone, the combination of the randomized and constantly-changing 6-digit number and your unique access to the phone, is an excellent way to authenticate your account.
SMS has its own faults - the SMS going out to your phone can be monitored, or your phone number can be spoofed. I would argue that the app authenticator process is, in fact, more secure.
Good luck out there. ??