Prank Call Tips :
1.If there is silence, just start asking questions, that will usually keep the conversation going.
2.If you run out of things to say or they're about to hang up, find a good closing insult or something. This will help your prank call be much funnier.
3.Make sure your soundboard doesn't suck, unless you're extreamly good at doing these. Most of the time a bad soundboard will result in a bad prank call. For example ones like Pee Wee Herman, Family Guy, Bender and others I don't usually get good luck with.
4.A good prank call should usually be at least 2 minutes long, however if you're soundboard is abusive then you can always tie prank calls together and make a collection of them that adds up to at least 2 minutes. That's what I do.
5.EDIT YOUR PRANK CALLS, I can't stress this enough. What I mean be editing your calls is, deleting long silence between you and your victim. Hearing prank calls with these long silences between the speakers is really annoying and most people will not want to listen.