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 Providerspage.

   Go to Identity Providers

2. On the Identity Providerspage, click Add a provider.

3. In the Select a providerlist, select phone Phone.

4. Click the Enabledtoggle 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 .