Man, I used to be heavy intro prank calling people as a kid but I'm too old for that now.
As a grown man, u can only keep prank calling people if ur really good at it and make up funny ass stories. I just wouldn't know what to say these days if I was to prank call someone. I can't be bothered with it.
As a kid, through middle school and the 1st couple of years of high school, me and my friends used to do it often.
There is a TV show in the UK called "Fonejacker". Its funny. If u have that kind of talent when it comes to prank calls, you should use it. Otherwise, u have to grow out of that sh!t at some point, if ur not really funny.