You'll get a QR code or setup key. Next, open the Google Authenticator app and tap the ... code from the account you want to add to the app (Facebook, Amazon, your bank, etc.). Let's look at ...

With Google Authenticator, the combination of your user name and password along with the single-use code generated by the application allows you to securely authenticate yourself in a way that ...

Also, Google still supports the old way of transferring Authenticator data to a new smartphone. It uses QR codes to move that data between devices. You’ll have to do that if you don’t want to ...