Random This request is missing a valid app identifier, meaning that neither SafetyNet..."

Question

I'm using Firebase Auth to authenticate my users using SMS in my Flutter app. I have set the fingerprints from Google Playstore in firebase and also I have this in my app/build.gradle

implementation 'androidx.browser:browser:1.0.0'

The issue is that I'm having the following message in devices like Pixel 6 Pro, but users using Samsung device are able to login.

This request is missing a valid app identifier, meaning that neither SafetyNet checks nor reCAPTCHA checks succeeded. Please try again, or check the logcat for more details.

I have followed the suggested answers here:

• Firebase phone authentication is not working on Android real device
• This request is missing a valid app identifier, meaning that neither safetyNet checks nor reCAPTCHA checks succeeded

Answer 1

I was finally able to solve this problem. The issue was that for some devices Android wasn't deleting the app info when deleting the flutter app, so somehow when installing a new version Android still had the old google-services file and thus giving this error.

So the final solution was to delete cache before installing the app.