If you're looking for a prank call app from iShowSpeed real call, maybe this is the one. You can make a fake call from iShowSpeed video call.

Please note: This is just an imitation app, it doesn't have call function like real one. Use this application for entertainment purposes only.

Disclaimer :
Call iShowSpeed is a prank app and is unofficial app, it just for entertainment and only for joke, it a 100% fake and fictional simulation just for prank and impress your friends or others.