The call came from this phone number: 240-249-2046. The voice message they left said "To protect your home If you would allow us to place a small sign in your yard we will install a new security system at absolutely no cost to you whatsoever no cost for the system or the installation whatsoever to hear more press 1 now to be placed on our do not call list press 9". They don't even have a name for their company - who would ever let these scammers into their home? If it's free be suspicious people! Bunch of scammers/fraudsters!
Just had the same number ring my cell, I wasn't around to answer and no voicemail left so I googled it, hence my comment. I'm glad I didn't answer! I rarely enter my cell number anywhere so I don't know where they got it from!