I still seem to be able to reduce my robocalls when they've increased in frequency by picking up and immediately muting my end. I think it tricks some dialer sy

I still seem to be able to reduce my robocalls when they've increased in frequency by picking up and immediately muting my end. I think it tricks some dialer systems into thinking the line is dead or a fax/modem, because after I do this once during a spat of robocalls, they seem to stop for a time