Called offering a security system. Told me my current one is "the worst" on the market and I would be murdered in my sleep if i kept it. Real cheerful experience.
Saw this on a different site so I'm guessing its a telemarketer. "This is a robo-dialer that periodically calls my phone throughout the month. They never leave messages when it goes to voice mail. I just added it to a contact for Telemarketer Scammer that is set to automatically go to voice mail. I don't get phone calls any more.