How to change the Signed in Phone Number in Firebase Authentication for Android?

Question

I am using Android Firebase Auth Ui for providing Phone Number based sign in option in an android app. I am trying to provide an additional option to signed in users to switch their signed in phone number to another number keeping the same user account.

But as per Firebase Docs for Phone number there are no options to change the signed in number.

There are options for linking different auth providers like email, google or Facebook login etc to same account. But there is no way mentioned about how to change the phone number or email id keeping the same user id.

Is there a workaround or method by which we can achieve this?

Answer 1

I also had this challenge to update user phone number and when I go on documentation I got something by using I have done this task.

you can go for documentation by click here

Now the method you can use : - for java android project.

PhoneAuthCredential phoneAuthCredential = PhoneAuthProvider.getCredential( "+91-98298XXXX2", "OTP_CODE" );
// Update Mobile Number...
firebaseAuth.getCurrentUser().updatePhoneNumber(phoneAuthCredential)
    .addOnCompleteListener(new OnCompleteListener <Void>() {
        @Override
        public void onComplete(@NonNull Task <Void> task) {
            if (task.isSuccessful()) {
                // Update Successfully
            } else {
                // Failed
            }
        }
    }
);