I’ve been going on youtube and playing “Office background noise” videos probably the same ones the scammers use. Then I tell them I’m an officer from whatever agency I feel like and then I improvise from there. So far I can almost hear the fear in their voice when they reply back they hear the phones ringing and people mumbling in the background it just makes it more authentic. Oh…and I like to use 202 area code Washing DC lol.