"You have been selected to receive a free medical alert device." I usually block suspicious numbers first, but it appeared to be a legit local number. Don't answer.

Or, you could do like I used to do when I had a little free time. Hit "1". Get the live person on the phone. Listen to the pitch. Tell them to send me the free unit. Then they want a credit card, I say "I don't need that service. Just send me the unit." They tell me that it won't work without it. Then I tell them that my grandson (which I don't have) is a computer genius and he can hack that thing to call the white house if he wanted to. Making it call "911" shouldn't be too much of a stretch for him.". Or another favorite, let them make their pitch. Then after a series of question to waste their time, politely explain that you would never do business with a company that starts out the relationship by violating the Do Not Call list. Then politely hang up. Yes, I know that this is a waste of your time. On the other hand, if every person who is contacted by these creeps kept their sales people on the phone for 5-10 minutes and didn't buy something (or give them your personal information) they couldn't stay in business. Even criminals don't work for free.