Verify the user using OTP | Firebase Android Authentication System Android Studio Part 2/4

How to verify user using OTP in Android app! , Google Firebase provides a phone authentication system, where a user can sign in to the Android app without typing their username and password. OTP is provided by google firebase server.

The first part here:

In this series of tutorial on how to apply OTP and Android app using Google Firebase Phone …


  1. Reply

    Nice vidéo but I have a problem. I whitelisted a phone number in my firebase console but when clicking on the button it shows the error message. Don't know what's the problem so if you can help

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