I need help with firebase authentication

hlo I am using firebase authentication for phone number sign in , but I am not receiving otp
I have added google services.json in assets and also added shai1 fingerprint
Also added country code in phone number
But still not getting otp

Have you followed this guide?

I have 2 numbers in one number otp is coming but in 2nd number otp is not coming
It is also not used as a demo account