You will need to get the "Duo" app on the Google Play Store or the Apple App Store.
Download and Install it on your mobile device.
On an web browser go to this website. You can use a computer or your mobile device.
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