Project Title: Fix Firebase Authentication Configuration for My Mobile App Project Description: I am looking for an experienced Firebase developer to check and fix the Firebase configuration for my mobile app. My app is having authentication issues, and I need someone who understands Firebase very well to investigate the problem properly, correct the setup, and make sure authentication works reliably. **What I need help with** * Review my current Firebase project configuration * Check Firebase Authentication setup * Identify why auth is failing or giving errors * Fix all Firebase auth-related configuration issues * Make sure signup/login works correctly * Check country/region-related auth issues if applicable * Verify all required settings are configured properly in Firebase and app side * Test and confirm the fix is working **Possible areas to check** * Phone Authentication configuration * Email/password auth setup * Firebase project settings * SHA keys / app signing configuration * API keys / google-services configuration * Authorized domains * Region/country restrictions * Play Integrity / SafetyNet / App Check if relevant * Android/iOS configuration issues * Backend or API connection issues related to Firebase auth **Important** My goal is not just a temporary workaround. I want the developer to properly diagnose the root cause and fix the Firebase authentication setup correctly. **Requirements** Please apply only if you have strong experience with: * Firebase Authentication * Firebase project configuration * Android/iOS app auth troubleshooting * Fixing real production auth issues **Deliverables** * Diagnose the problem * Fix the issue * Explain clearly what was wrong * Confirm working authentication * Share any important notes I need for future maintenance When applying, please send: * your Firebase experience * similar work you have done * how you would approach debugging this * estimated time to fix * your rate I need someone who can take a careful look and solve the issue properly, not guesswork.