On an web browser go to this website
Choose one of the choices to authenticate – I choose Call Me
Choose Mobile phone>continue
Enter the Phone # and check the replace this number if you already had a phone attached to "Duo" choose "continue"
Choose what type of phone
Get the Duo App or if you already have installed it select I have the Duo Mobile Installed
Follow the directions and click "Continue"
Choose to automatically send this device a Duo Push press Saved