Firebase not working with 4G on some devices

[Dardo Gonzalez]

Hi!

I have an issue with Firebase when connecting with the 4G network on some devices.

When I try to sign in with a custom token this way:

FirebaseAuth mAuth = FirebaseAuth.getInstance();

Task<AuthResult> signInTask = mAuth.signInWithCustomToken(firebaseToken);

signInTask.addOnCompleteListener(onSignInCompletedListener);

The listener is called with this error:

A network error (such as timeout, interrupted connection or unreachable host) has occurred.

But this happens only on some devices, and it doesn't depend on the carrier. For instance, I try to run my app on a Moto G4 with mobile data and it works fine, then I move the SMS to a Moto X, and with mobile data I get the previous error.

On WIFI all devices works very well.

Does anyone have this problem?

Thanks!