Google Authenticator provides an extra layer of security. Since the Google Authenticator app is not tied to your phone number (you'll still need a phone number associated with your Coinbase account in order to buy or sell digital currency), you will be protected even in the event of an attacker compromising your phone number.
When using Google Authenticator for your 2-step verification codes, you will still be protected even if your password is stolen and your phone number is ported. When using Google Authenticator, the only way to generate 2-step verification codes is by physically accessing your Google Authenticator app.
*Before you begin, please note that enabling an Authenticator App will disable both SMS code delivery and Authy tokens - these will no longer work with your Coinbase account. Disabling anAuthenticator App will re-enable SMS codes.
Log in to your Coinbase account using your current email, password and 2-factor authentication method.