"Missed call"on on my cell phone...left no message. I'm with the previous poster - how did they get my cell phone #? I am on the "Do Not Call" registry.
Usually the telescammers just plumb a set of numbers into dialers or computers. The numbers they use are generally spoofed numbers. Those don't and won't recognize unlisted numbers.
But be aware, google your name & number, remove any info from places such as Spokeo that shows up. Make sure places like FB is turned to private and none of your personal information can be seen.
You can see if there is a call blocking app online that will work for your phone. Some of the newer phones already have this.
Called me in the middle of the night. One ring and they hung up. Useless inconsiderate morons, also I never deal with telemarketers. If I want something I go to the store. Calling private numbers is harrassment and should be illegal!