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. This week, Google has given its 2FA app ...

First, turn on two-factor authentication for the account. You'll get a QR code or setup key. Next, open the Google Authenticator app and tap the plus sign. Record the 2FA code/key. Whenever you're ...

Google Authenticator now syncs one-time codes with your account, so you're not stuck if you lose your device.

Google Authenticator has been around for over a decade, is free, and will work with virtually every service that supports ...

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.

Google Authenticator was among the earliest mass-market TOTP apps, having debuted in 2010, but for its first few years it did not support phone-to-phone transfer of saved codes.