This app is terrible. Totally amateur. It's either block everything, then wait 10 minutes for screened call voicemail to show up so you can see which calls you missed 10 minutes ago, or only block numbers that start like yours. It's worse that useless - it's self sabotage. I'm better off getting spam calls, and handling them myself, than not getting any call that isn't already a contact of mine - even though it isn't known or suspected spam. What a terrible app.