For anyone interested and not aware, Verizon's new free version of their Call Filter subscription is now active for some level of robocall/spam blocking. No telling how well it might work, but at least it's a start. The Call Filter app is generally pre-installed on most Verizon Android phones, and available through the App Store for the unfortunate folks in the Apple camp. I've found that if you already have it on your phone, the app itself will only show the paid subscription option. You have to go in through your account (website or via My Verizon app) and add the free version of the Call Filter subscription to your account, then it will send an update to activate the free subscription on the app your phone.
Full Instructions here: Call Filter How to Use Guide | Verizon Wireless
Full Instructions here: Call Filter How to Use Guide | Verizon Wireless