Prerequisite : “Identify and add SHA1 / SHA-256 Certificates to Firebase console for Phone Authentication” When we were trying for Firebased based SMS OTP Authentication for our android app, we followed all the steps but got the exception as below, com.google.firebase.auth.FirebaseAuthException: 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 Solution : This can be solved by modifying app/build.gradle to add a line as, implementation 'androidx.browser:browser:1.0.0'

Execution & Command Syntax

Terminalbash
sed based SMS OTP Authentication for our android app, we followed all the steps but got the exception as below, com

Gotchas and Common Issues

  • Permission Verification - confirm execution permissions and path variables before invoking system binaries.

  • Version Compatibility - check software version release notes for deprecated flags or syntax changes.

  • Log Monitoring - inspect system logs (journalctl or /var/log) to troubleshoot execution failures.

Following these steps ensures clean configuration, proper security boundaries, and reliable execution for fixed: this request is missing a valid app identifier.