Answered & immediately hit mute & just listened (my MO when there is no caller ID) after a few seconds a female voice said "Hi" then went into a special interest spiel at the end asked a "yes" or "no" question I just hung up. I've heard about scammers that will try to get you to answer "yes" or "no" which they record and can apparently use your voice to access a bank account. Have no idea if this is true, but why take a chance.
I answer and no one responded. Typically means the robot did not make the connection. I am not sure what type of call it is but I don't know anyone in Nogales, AZ. I assume it is a sales call.