We always verify our phone number before using some apps like Whatsapp via OTP. If you are an android developer and you also want to verify your user by sending OTP to mobile then you have landed in right place. In this tutorial, I will guide you to how to use free Firebase phone authentication in your android app. This is not only for android app but it can also be used in ios and web app but here we will see how to integrate into android only.Follow the video tutorial and given source code. Let me know your result by your comment below.
Complete source code
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