All you have to do is scan a QR code for the service you want to turn 2FA on for, and the app will generate a new log-in code around every 30 seconds.

I prefer the option to use an authenticator app rather than receiving codes via text message whenever possible, and so should you. The reason is simple logistics.

This usually generates a QR code, which you can then scan using the Microsoft Authenticator app. Now that you have your accounts set up, you'll be prompted to enter a six-digit code the next time ...

You can sync your authenticator codes to your Google Account and across your devices. It offers support for multiple accounts, and you can transfer accounts between devices by using a QR code.

On your new phone's Authenticator app, tap Scan QR code. After you scan your QR codes, you get a confirmation that your Google Authenticator accounts were transferred. You can remove your exported ...