Now that I have this cell phone jammer I can see why it has so many good reviews. Before getting the blocker we had 30 to 40 unwanted calls a week. Once I use this device, I will get not one call. Since hooking it up one month ago I have manually blocked 11 phone numbers and 19 area codes and I keep getting fewer and few calls. I cannot believe it took me so long to find this device. We had been suffering all the abuse for way too long.. I cannot imagine living with out this product now.