Android-OTP
Authenticate with Firebase on Android using a Phone Number You can use Firebase Authentication to sign in a user by sending an SMS message to the user's phone. The user signs in using a one-time code contained in the SMS message.
Authenticate with Firebase on Android using a Phone Number You can use Firebase Authentication to sign in a user by sending an SMS message to the user's phone. The user signs in using a one-time code contained in the SMS message.