"After a quick setup, you’ll receive a local phone number. CallJoy will immediately begin blocking unwanted spam calls so you receive the calls that matter—the

"After a quick setup, you’ll receive a local phone number. CallJoy will immediately begin blocking unwanted spam calls so you receive the calls that matter—the ones from customers" Would really like to know how they implement the spam call blocking. Spam calls especially to businesses are a huge problem in the United States and anyone who solves that problem will make billions.