live with and care for two disabled elderly relatives who were being absolutely bombarded with robocalls, scammers and telemarketers. At the very least five or more calls, 7 a.m. to 10 p.m. seven days a week. We never were actually scammed but the constant interruptions were causing chaos. I tried blocking with our handsets but they just weren't robust enough to stop the problem. Exasperated, I found this cell phone jammer and gave it a shot. Some here are saying that it doesn't seem to work well with U.S. phone systems but I haven't found that to be the case in our situation.