Perhaps the one thing many need to start thinking is when your phone rings, that doesn't mean a person, a human, wants to talk or has information that's worth your time.
It may be a computer calling, sometimes known as a "Robocall".
Think of it as someone wanting some of your time. Is your time, even a few seconds or minutes, without value?
Do you make a habit of allowing others to demand some of it at their whim? We all have 24 hours in a day and once a minute is gone, you can't get it back.
Further, if a human or a computer controlled by a human calls during your meal time, family time, etc., the human is likely at work and getting paid while taking your time.
Suspicious about the call and want to find out? Ask the caller for a name and number so you can call back at a later time. Suddenly you will find out if the caller respects your time that is being sought.
As a matter of fact, the next few time your phone rings, ask for the name of the person calling and the phone number and see what reply you get.