I am from India, am working on an ios app, In this the Indian mobile numbers are successfully getting OTP from the firebase where the international mobile numbers that are used in physical devices in their respective countries are not getting OTP. I tried using the international numbers from India for authentication then they are getting OTP in their country, But when they are testing app from their country the OTP not receiving for international numbers in their physical devices.( In my firebase iOS app configuration I used **APNS Certificate(.p12) **, not uploaded
APNs Authentication Key).
currently using the latest firebase ios SDK 5.17.0
the latest version of Xcode 10
latest iOS 12
anyone has a solution please respond. TIA!