same thing happened to me.  i hung up.  what was crazy is i had just gotten off of a 405 call. didn't call back to the spammy number though.

Calls once every other month and have added the caller to my reject list on my phone but the calls still comes through. WTF??? How do I get this caller to stop calling me?

Received a call today from this number and they left a voice mail message to receive a free $1500 security system monitored by my local police and fire department 7/24.  I was suppose to press 1 for more information or 2 for a do not call list.  What did I do?  Put a block on all future calls from this number and deleted the voice mail message.  On my phone, no name no answer the phone.  Bye!

Called on my cellphone. No message. ID  Oklahoma City.

Call about security system for free, but when you call back number off