I cant call the phone number in the purse on the game art of murder fbi confidential?

i tried to call the number in the purse in the thug hide out but i cant get it to work it keeps coming up with a bizzy singal. can someone help me.|||This is not a real number, but a fake one. If you need it to progress in the game, you will need to call with a phone inside the game. If you are using a phone inside the game, then the busy signal might be a clue.