Most, to all, of the telephone scammers are based in Asia. They use high speed internet, voip, and a few dollars in software. They make millions of calls a day for a few rupee's. They are out of the reach of US Justice, & they know it. Many of the countries calling you don't consider it a crime to scam Americans. As a suggestion, get a call blocking app for cell phone, blocking device for landline. Start blocking entire area codes. No Uncle Ollie in Orlando (407)? Block 'em. If they can't reach you, they can't scam you. Correct?