Why is OTP login not working consistently on the mobile app?

OTP login works properly on the mobile app up to a certain device/user limit. After that, you may face issues because Firebase provides limited free OTP usage.

This is not a bug in the app or product. It happens due to Firebase’s free-tier limitations.

🔐 How to fix OTP issues permanently?

To use OTP login without limitations and ensure it works reliably on many devices, you need to purchase your Firebase Identity Platform plan(based on your requirement).

Please visit the official Firebase pricing page:
👉 https://cloud.google.com/identity-platform/pricing

From the pricing table, choose and purchase a plan that matches your usage requirements.

📌 Important Notes

• Once a paid plan is activated, OTP login will work smoothly.
• Free plans are suitable only for testing or limited usage.
• Higher OTP usage requires a paid Firebase plan.