In the Nomorobo Max app, you can verify activation by doing a Test Call.
In the app, go to Settings, and under Troubleshooting, tap Make A Test Call.
You should see two things:
1. A Silenced call push notification. If the test call isn't silenced, please tap Help, the Call Wasn't Silenced.
2. Nomorobo Max will analyze the call and then say Test Call Successful.
For additional troubleshooting & help with activating Nomorobo Max click HERE