i JUST HIT THE CONNECT BUTTON ON MY PHONE THEN IMMEDIATELY HIT THE DISCONNECT. DNCL IS USELESS YOUR PHONE COMPANY IS USELESS SO I DO THIS TO ANNOY. NO MAYBE IT IS NOT EFFECTIVE BUT I DO GET PERSONAL SATISFACTION. I AM FINDING I GET LESS CALLS OR AT LEAST I THINK SO DOING THIS.
AS FOR THE CALL BLOCKER MACHINES THEY ARE MAINLY USED ANS SOLD IN EUROPE. I THINK THEY CAN BE MORE BOTHERSOME THAN THEY ARE WORTH.