Have you ever received a phone call where your call display shows "Block Caller". This person has probably called you like 5 times in 1 min. This website called TrapCall will allow you to know who is calling you even if it's blocked by the other user. This program (Beta) takes less than 2 minutes to install. Unfortunately if you live in Canada this is not available yet but they are working on making it available. Right now if you are in the States this works for you! No more crank calls.