Too bad that it doesn't work, now they just spoof somebody else's number so you don't know who is calling. First I was getting 3 and 4 messages per day from the same number, which was the last half of a recording. I finally blocked my own number and called theirs... it was for extended auto warranty coverage. THen I started getting multiple calls per day from various numbers; my phone has a blcok feature but as soon as I blocked one they would start using another. Until recently I was getting 10-12 calls per day from various places across the US.