How to Set Up Firebase Phone Authentication in React Native
· 10 min read
Last updated on August 17, 2022
Logging in a mobile app using the Phone number and a unique SMS verification code is one of the most common patterns to authenticate a user. In this tutorial, I am going to guide you through the process by demonstrating a login screen. To efficiently set up a backend service, let us use Firebase. There is a particular flow is followed when it comes to using the Phone sign-in method. When the user enters a number, they are sending a request an OTP from Firebase. The Firebase service then uses reCAPTCHA first to verify the user’s authenticity. Once that’s confirmed, it sends the OTP to the mobile number user previously entered. Lastly, the user can enter that value to sign in successfully.