On your Veriphi Dashboard:
Select My Profile.
Scroll down until you see Two Factor Authentication and click on the button.
Your phone number will be displayed, click on Confirm Phone Number to proceed.
You will receive an SMS with a unique code.
Enter the code and click on Submit.
Two Factor Authentication is now activated for your account!
You will need to enter the code you receive by SMS each time you login.
To turn off, simply go back to My Profile, scroll down and select Deactivate.