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Firebase Auth & Realtime Database Apps · Lesson

Phone Number Authentication

Implement robust phone number authentication using SMS verification for secure user access.

Secure Login with Phone Numbers

Phone number authentication allows users to sign in to your app using their mobile phone number. It's a secure and convenient method, especially for users who prefer not to create traditional email/password accounts or use social logins.

  • Accessibility: Many users find it easy to use.
  • Security: Leverages SMS for verification, adding a layer of security.
  • No Passwords: Reduces password fatigue and forgotten password issues.

Enabling Phone Authentication

Before you can use phone number authentication in your app, you need to enable it in your Firebase project settings.

  1. Go to the Firebase Console.
  2. Navigate to Authentication > Sign-in method.
  3. Enable the Phone provider.
  4. Optionally, specify which phone numbers are allowed for testing.

This step tells Firebase that your project will support phone sign-ins.

All lessons in this course

  1. Phone Number Authentication
  2. Multi-Factor Authentication (MFA)
  3. Custom Claims & Security Rules
  4. Account Linking & Provider Management
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