The android mobile app demonstrates the mobile authentication. The app is developed through Firebase platform.
- When the user opens the app, the app requests for a mobile number (by default, Australia).
- Once the mobile number is given, the app sends a verification code to the number.
- When the verification is done successfully, the app redirects to a new page.
- If the user is using the app for the first time, it prompts “Welcome New User”.
- Else it prompts “Welcome back” irrespective of the device.
- User can log out.
Source: https://firebase.google.com/docs/auth/android/phone-auth