About two weeks ago, there were about three days in a row when I was getting about 6-10 calls each day on my cell. Each time, it was a different number, and every number was 11 or 12 digits long. I asked the cell company if they could block it and they said that they could only block 10 digit numbers so they couldn't do anything. I am already on the do not call list, but I don't think that it was telemarketers. There was just silence the 2 or 3 times I answered. It was very weird.