New tactic for those sales calls that clog up your phone all the time.

Rather than getting upset, just press the button that gets you to a person.

Once they're on the line, regardless of what they ask or say, "Oh hang on, there's someone at the door I'll be right back" and mute it.

Then put the phone down, and watch how long it takes for them to hang up on me.

Just started; this first Indian-accent-talker made it over a minute! :)