Firebase Phone Number Authentication Issue

Question

I am using firebase in my project for phone number verification. A few phone numbers have this issue. Alert like

"There seems to be a problem with your project's firebase phone number authentication set-up, please make sure to follow the instructions found at https:// firebase.google.com/docs/auth/ios/phone-auth"

Any idea where to look next? Thanks in advance.

Alert Msg Screenshot

Answer 1

You get this message if the user has disabled notifications.

To use phone number authentication, your app must be able to receive silent APNs notifications from Firebase.

https://firebase.google.com/docs/auth/ios/phone-auth