A joke.. Don't work
POOR Doesn't have options (like voicemail, hang up..etc). - Can't customize it (all numbers are treated the same). - Has horrible user interface (confusing so can't do things like set if/how you're notified after block). UNINSTALL
daddio worse one i tried ... i have been trying them all
NO! It;'s garbage. Save yourself a restore.
Excellent Its just a wonderful app
Use Truecaller to identify unknown calls, and block spam calls and spam SMS.