Is the Phone MFA Voice Enrollment Error Message "We couldn't make the voice call. Please try again later" Customizable

Last Updated: Sep 10, 2025

Overview

When a user attempts to enroll in Phone MFA with Voice, as opposed to SMS, and inputs an invalid number, the following error message is generated and shown in the widget:

We couldn't make the voice call. Please try again later

This article clarifies whether this text is customizable for the Phone MFA Voice enrollment.

Applies To

New Universal Login
Prompts
Phone MFA Voice
Branding

Cause

When reviewing the available prompts for the enrollment screen in Auth0 documentation, there does not appear to be a relevant field to update.

Solution

At this time, this error message is non-configurable.

NOTE: This error message is also returned for two other prompts:

prompt: mfa-voice, screen: mfa-voice-challenge
prompt: phone-identifier_challenge, screen: phone-identifier-challenge

Updating either of these prompts will have no effect on the Phone MFA Voice enrollment screen.