Configurable to drop masked numbers. These are numbers that are hidden by the telephone company or labeled as "Unknown" on your phone when the call comes in.
The incoming call will ring for a very short time, and will be automatically dropped if detected to be unwanted.
COMING SOON in the next version:
-- Adding a blacklist so that you can add unwanted phone numbers to the blacklist.
-- View past history of dropped calls by Call Defender.