Elmokalma Elqatela(1996)

Original title: المكالمة القاتلة

A playful, reckless young girl makes a random nuisance call to a stranger telling him that she knew about him murdering his wife. Coincidentally, she was speaking to a man who did murder his wife. When he tries to buy her silence, she starts blackmailing him, so he plans to kill her too. This is when a journalist, Faten, is called in to the rescue of her cousin, the nuisance caller.