I've had six calls in the last 3 days. Each time they ask for random names, when you state that you don't know who the person is they begin cussing until you hang up. The last call, they identified themselves as "me" when I didn't know who "me" was they screamed expletives. I hung up and blocked the number, they've called twice since I blocked them. I have had both a male and a female sounding voice.