Enable Nomorobo on iPhone 1. Once you've downloaded the Nomorobo app in the Apple App Store, go to the "Settings" app on your home page. 2. Click "Phone". 3. Click "Call Blocking & Identification". 4. Enable Nomorobo. 5. Return to the Nomorobo App for confirmation. Have more questions? Submit a request 0 Comments Article is closed for comments.