Has your organization enabled the new Universal Prompt experience? See the Universal Prompt guide for more information and instructions. Duo Push in Universal Prompt

Use Any Cell Phone or Landline with the Traditional Duo Prompt

Duo works with all cell phones and landlines by supporting authentication via phone call and SMS passcodes.

Phone Call

Click the Call Me button on the Duo Prompt (or type "phone" in the "second password" field if you don't see Duo's interactive prompt) and Duo will call your phone. The status bar at the bottom of the Duo Prompt updates at each step of the process.

Begin Phone Call Authentication

Answer the call and listen to the instructions to authenticate. The Duo Prompt's status bar also tells you how to approve the request over the phone.

Phone Call Authentication Instructions in Duo Prompt

SMS Passcodes

You can authenticate using a passcode texted to your phone. To have Duo text you a batch of passcodes click the Text me new codes button after clicking Enter a Passcode (or type "sms" in the "second password" field).

Request SMS Passcodes in Duo Prompt

The Duo Prompt's status bar indicates the passcodes were sent to your phone. The number of SMS passcodes sent in one batch is defined by your administrator (ten maximum). Sending multiple passcodes at once lets you use those passcodes to authenticate multiple times when you may not have cellular service.

Passcodes Sent Message

To authenticate using an SMS passcode, click the Enter a Passcode button, type in a passcode you received from Duo via text message, and click Log In.

Enter Passcode in Duo Prompt

Duo keeps track of which SMS passcodes you've already used in your batch, letting you know which one to use next.

Next Passcode Hint Text

You can have new passcodes sent to you at any time. A new batch of passcodes will invalidate all old passcodes, so it's probably best to delete the old message when a new one comes in.