While implementing app-app calling with Sinch, I need to integrate push notification using firebase cloud messaging(FCM). As there is no doc available so I followed the same process like GCM but when I called
mSinchClient.setSupportManagedPush(true);
it is throwing exception missing GCM exception
com.sinch.android.rtc.MissingGCMException: Can't enable managed push as this depends on GCM, which is not available on this device