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Flutter – sms code not working with firebase phone number authentication

I have been working on phone number authentication with flutter and firebase.
I have a weird behavior and I don’t know where to look.
I have activated play integrity in play console. To be honest, I am sure if I have done everything right.

In my code I have something like:

await FirebaseAppCheck.instance.activate(
androidProvider: AndroidProvider.playIntegrity,
appleProvider: AppleProvider.debug,
);

When I deploy the app on a physical phone (S20) via USB I get the sms verification code and it works.
But the same version is also published as internal test in play console and as a tester I have downloaded the app. But I get verification failed when I entered the sms code.
Unfortunately the debug logs are not printed in Android studio.

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2

Answers


  1. Chosen as BEST ANSWER
    0

    Well, I managed to get crashlytics working. I had the google-services.json at the wrong level. I could then see that the error was:

    [firebase_auth/session-expired] The sms code has expired. Please re-send the verification code to try again

    It seems to be that I am calling signInWithCredential twice. I have to look into it.


  2. 0

    Check these points:

    1.Play Integrity API: Ensure it’s enabled and properly configured in Google Cloud Console.

    2.SHA Certificates:Verify debug, release, and Play Store SHA certificates are in the Firebase console if the app is in the Play Store.

    3.App Check: Ensure tokens are validated correctly; add debug tokens for testing.

    4.Firebase Authentication: Confirm settings, SMS quota, and check usage logs for errors.

    1. Error Logs: Use print statements or adb logcat for logs since they’re missing in Android Studio.

    Review Play Integrity setup if the issue persists.

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