Signing in users with a phone number on Identity Platform

This document shows you how to use Identity Platform to sign in users with a phone number.

Before you begin

Sign in to your Google Cloud account. If you're new to Google Cloud, create an account to evaluate how our products perform in real-world scenarios. New customers also get $300 in free credits to run, test, and deploy workloads.

In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

Roles required to select or create a project

• Select a project: Selecting a project doesn't require a specific IAM role—you can select any project that you've been granted a role on.
• Create a project: To create a project, you need the Project Creator (roles/resourcemanager.projectCreator), which contains the resourcemanager.projects.create permission. Learn how to grant roles.

Go to project selector

Verify that billing is enabled for your Google Cloud project.

In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

Roles required to select or create a project

• Select a project: Selecting a project doesn't require a specific IAM role—you can select any project that you've been granted a role on.
• Create a project: To create a project, you need the Project Creator (roles/resourcemanager.projectCreator), which contains the resourcemanager.projects.create permission. Learn how to grant roles.

Go to project selector

Verify that billing is enabled for your Google Cloud project.

1. Enable Identity Platform. See the Quickstart to learn how.

Enable phone sign-in for Identity Platform

1. Go to the Identity Providers page.

   Go to Identity Providers

2. On the Identity Providers page, click Add a provider.

3. In the Select a provider list, select phone Phone.

4. Click the Enabled toggle to on.

5. To save the provider settings, click Save.

Configure phone sign-in for your app platform

If you are using Identity Platform for Apple, Android, or web platforms, you must also configure your app from the Firebase console.

• For Apple platforms:

  • Enable phone number sign-in for your Firebase project.
  • Enable app verification with silent push notifications.

  For instructions, see Authenticate with Firebase on Apple platforms using a phone number.

• For Android platforms:

  • Enable phone number sign-in for your Firebase project.
  • Enable app verification with the Play Integrity API.

  For instructions, see Authenticate with Firebase on Android using a phone number.

• For web platforms:

  • Enable phone number sign-in for your Firebase project.
  • Set up the reCAPTCHA verifier.

  For instructions, see Authenticate with Firebase with a phone number using JavaScript.

What's Next

• Learn how to register test phone numbers for development purposes.
• Learn how to use SMS regions to restrict Identity Platform SMS verification usage.