Two-Factor Authentication (or 2FA) is a security feature that requires an extra code provided by your smartphone to log in. CallTrackingMetrics supports two types of two-factor authentication: text messaging and Google Authenticator.
Settings > Your Profile > Instructions
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**Pro**: easily keep track of login attempts for your user profile, and view the two-factor code directly in the notification on your smartphone.
**Con**: uses a text message each time, which may be limited on some cell phone plans.
Google Authenticator requires some additional setup before it can be used. First you will need to download the Google Authenticator app for your smartphone, and you may need to download a QR Code scanner as well.
iPhone, Android, Blackberry: https://support.google.com/accounts/answer/1066447?hl=en
Windows Phone: https://www.microsoft.com/en-US/store/apps/Authenticator/9WZDNCRFJ3RJ
**Pro**: does not require a text message.
**Con**: accessing the two-factor code can be slightly more involved.
Agencies on an Advanced or Elite plan can require users across all sub-accounts to enable two-factor authentication.