Dead Tone (2007)

Slasher flick Dead Tone (2007) stars Brian Hooks, Jud Tylor, Germán Legarreta, and former child star Cherie Johnson as a group of college kids who invent a game called "75" in which the player calls a random phone number and tries to keep whoever answers scared for 75 seconds. But when they call the wrong number, a trip to a rich classmate's weekend party becomes an opportunity for someone to take a gruesome revenge on the pranksters. There's no skin in Dead Tone, so don't be surprised if you have a dead bone.