Firebase OTP only works in some devices - Swift 4

Question

I am using firebase authentication in my device. I have followed every steps in firebase documentation. The OTP works in the devices that I used for testing purpose. But when I download the app from AppStore, It does not work. Please help me to get rid of this issue. Thanks in advance.

Answer 1

I got the answer.

There were 2 things wrong with what I was done.

1. When I created SSL certificate (For push notification) from App Ids under 'Certificates, Identifiers & Profiles' tab in developer.apple.com, The certificate was not created for production. So I created one for production.

2. I forgot to create APNs key. So I created APNs key from Keys under 'Certificates, Identifiers & Profiles' tab in developer.apple.com. Then I uploaded it in the firebase App (console.firebase.google.com). After you select your project, you can find a gear icon in the firebase website. Select project settings from there and click on the cloud messaging tab. And there you can find the option to upload APNs certificate.