Rang three times and hung up.

Called my cell phone at 11pm at night and hung up.   [***].   Some of us have to work for an honest living, which requires sleep.  

Rang once. No message. Number not listed nor known by me.

My cell phone only ran once.   The scammer wants you to call back for curiosity so it rang once.    The auto message you will hear when you call back - congratulations, you win a $100  walmart gift card and press 1 to connect a representative.    I pressed 1 and heard a guy with severe foreign accent.  Of course the guy want to get my credit card or bank account.  I kept silent and he hang up.   Please remember to use "star" + 67 before you dial that 415 number to hide your own caller ID.

Called here at 10:30 pm. I do not answer numbers that I am unfamiliar with. Rang twice and hung up.