docs: Add iOS CoreTelephony troubleshooting section in README.MD (#600)
docs: Add iOS CoreTelephony troubleshooting section in README.MD (#600)


rebeccahughes/react-native-device-info,rebeccahughes/react-native-device-info,rebeccahughes/react-native-device-info,rebeccahughes/react-native-device-info,rebeccahughes/react-native-device-info,rebeccahughes/react-native-device-info