Creatively answering the phone for strange/unknown numbers is fun could also be fun for sales people too 😉 :
$randomlocale circumcisions. You flop it, we chop it.
$pizzaco, may I start with your phone number?
Joe's Morgue. You kill 'em, we chill 'em
Your call could not be connected, please check the number and try again (wait 2 seconds and repeat until hang up)
Hello? HEEELLLLOOO? Who's there? I can't hear you. Is phone on mute? Hello? You aren't funny.
$town police station, Sergeant Stevens speaking.
Or, the fan favourite: