True. I have over 100 numbers blocked on each of my two mobile phones. I get more robo calls, scam calls, and wrong numbers than I do legitimate calls. I keep my emergency mobile's ringer turned off so I can be in peace. My main mobile stays on during the day, but if I want to nap or once I am ready to retire for the night, I put it on Do Not Disturb so I can get some rest. It never fails that the phone will not ring all day long, but as soon as I lie down for a nap, or after I have retired for the night, that is the time a call will come in, and it is usually a robo call or some such. It is enough to make you want to pull your hair out by the roots!