When I am trying to phone authntication I am getting below error.
W/BiChannelGoogleApi(12340): [FirebaseAuth: ] getGoogleApiForMethod() returned Gms: com.goo
This might be due to an incompatible version of google play services on your testing device.
If it is an emulator, try switching to another image and check if you are on the lastest version of play services.
Note that only Android N (API 24) and above supports update of play services via playstore.