> ## Documentation Index
> Fetch the complete documentation index at: https://docs-dev-feat-3p-app-cross-app.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.
> Learn how to configure Auth0's Unified Phone Experience for MFA and Passwordless.
# Configure Auth0 Unified Phone Experience
If you use [Passwordless SMS authentication](/docs/authenticate/passwordless/authentication-methods/use-sms-gateway-passwordless), [MFA SMS and voice notifications](/docs/secure/multi-factor-authentication/multi-factor-authentication-factors/configure-sms-voice-notifications-mfa), or Phone as ID, you need to configure a phone provider with the Unified Phone Experience.
If you need different providers for MFA, Passwordless, and/or Phone as ID, you must configure a [custom phone provider](/docs/customize/phone-messages/configure-phone-messaging-providers/configure-a-custom-phone-provider) using Auth0 Actions.
The Unified Phone Experience centralizes all phone provider configurations in one location in your tenant. This centralization eliminates the need to configure a phone provider multiple times for various phone authentication factors.
If you want to try out phone messaging capabilities, you need to configure a tenant-level phone provider.
Auth0 does not provide feedback to the end user on whether a phone message has been sent successfully with the tenant-level provider. To troubleshoot issues, review the [tenant logs](/docs/deploy-monitor/logs).
## Configure MFA
You can use the Unified Phone Experience with SMS, Voice, and SMS + Voice delivery methods and factors. To learn more about MFA with Auth0, read [Multi-Factor Authentication](/docs/secure/multi-factor-authentication).
1. In the Auth0 Dashboard, navigate to [**Branding > Phone Provider**](https://manage.auth0.com/#/phone/templates/phone/provider).
2. Enable the Phone Message Provider toggle.
3. Select your phone message provider.
1. To use Twilio as your phone provider, follow [Configure Twilio as a Phone Messaging Provider](/docs/customize/phone-messages/configure-phone-messaging-providers/configure-twilio-as-a-phone-messaging-provider).
2. To use a custom provider, follow [Configure a Custom Phone Provider](/docs/customize/phone-messages/configure-phone-messaging-providers/configure-a-custom-phone-provider) to use Auth0 Actions.
4. Select your delivery method(s).
Desired MFA factors must be a subset of the delivery methods you configure at the tenant-level.
5. **Save** your changes.
6. Once complete, navigate to [Security > Multi-factor Auth](https://manage.auth0.com/#/security/mfa).
7. Select **Phone Message**.
8. Choose the authentication factors.
9. **Save** your changes.
## Configure Passwordless
You can use the Unified Phone Experience with a Passwordless SMS connection. To learn more about passwordless authentication with Auth0, read [Passwordless Connections](/docs/authenticate/passwordless).
1. In the Auth0 Dashboard, navigate to [**Branding > Phone Provider**](https://manage.auth0.com/#/phone/templates/phone/provider).
2. Enable the Phone Message Provider toggle.
3. Select your phone message provider.
1. To use Twilio as your phone provider, follow [Configure Twilio as a Phone Messaging Provider](/docs/customize/phone-messages/configure-phone-messaging-providers/configure-twilio-as-a-phone-messaging-provider).
2. To use a custom provider, follow follow [Configure a Custom Phone Provider](/docs/customize/phone-messages/configure-phone-messaging-providers/configure-a-custom-phone-provider) to use Auth0 Actions.
4. Select your delivery method.
If you do not select **Text** as a configured delivery method, your integration with Passwordless will not work.
5. **Save** your changes.
6. Once complete, navigate to [**Authentication > Passwordless > SMS**](https://manage.auth0.com/#/connections/passwordless).
7. **Save** your changes.
8. If you are using Twilio:
1. Navigate to [**Applications > Applications**](https://manage.auth0.com/#/applications).
2. Select the application(s) you want to use for your Twilio SMS connection for Passwordless.
3. Under **Connections**, enable the SMS (Twilio) option.
4. Return to [**Authentication > Passwordless > SMS**](https://manage.auth0.com/#/connections/passwordless).
5. Under the **Applications** tab, enable all applications you want to use for Passwordless SMS.
6. **Save** your changes.
If you have a use case in need of the legacy [MFA](/docs/secure/multi-factor-authentication/multi-factor-authentication-factors/configure-sms-voice-notifications-mfa) and [Passwordless](/docs/authenticate/passwordless/authentication-methods/use-sms-gateway-passwordless) experience, contact [Auth0 Support](/docs/troubleshoot/customer-support).
### Test your phone provider
Test the tenant-level provider before using it in a production environment:
1. Navigate to [**Branding > Phone Provider**](https://manage.auth0.com/#/phone/templates/phone/provider).
2. Select **Send Test Message** to test the tenant-level provider before using it in a production environment.
## Configure phone templates
The tenant-level phone provider uses [Liquid syntax](https://github.com/Shopify/liquid/wiki/Liquid-for-Designers) to inject contextual variables into your phone message content. To configure your phone templates, follow the instructions in [Customize Phone Templates](/docs/customize/phone-messages/phone-templates/customize).
## Disable phone provider
If you configure the Unified Phone Experience and then disable it, existing integrations with your phone provider could break, including your MFA phone factor.
