Robo and unwanted phone calls.
I've been getting a lot of robo's lately and had to use an old trick.
I learned this trick a long time ago on how to stop robo calls. First you answer the call but don't say a word but keep hitting the pound sign (#) fifteen to twenty times. It screws up their computer and removes your number from their list.
If your not sure the incoming call is a robo just say "Hello" one time only. Do not not say anything else. If you don't get an answer it is a robo call.