Q: How do you make prank phone calls to the peramedics, firefighters, police, fbi, and army? How do you say exactly what you want?
A: here it is from IGN Easter Egg: Prank Calls Here's something funny to try. During your adventure through Liberty City, you may find phone numbers written in inconspicuous places, such as on the side of a building or in the subway. If you dial these numbers, you'll usually get someone on the other end who you can subsequently prank.