Title: Helps a lot - but nothing helps 100% !
Review: I have this Telezapper on several of my phones - and on my FAX machines. It has significantly cut down on telemarketer calls on the telephones. There are still some "spammy" FAXes that can seem to get through the Telezapper but even those seem to be fewer. There are few little gadgets that will work out to be 100% effective, but this item will help quite a bit with very little input from the owner - and there is no recurring monthly charge!
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