For those of you asking how someone can leave a vm on your phone without making it ring, Lu answers this question if you go back to page 2 and read the comments there. According to Lu, an app called SlyDial lets you leave a message without ringing the phone -which would be fine if it were from a friend, but it's creepy from a telemarketer/scammer!
www.slydial.com if you want to read more about them
More importantly, I wanted to know if there was a way to block unwanted people from using SlyDial to leave messages again ... I'm on Verizon, so I'm pasting what they had to say about SlyDial below... Hope this helps!
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"Verizon Wireless Customer Support
May 26, 2014"
"Hello KCMO2. That definitely is a phishing scam site, so good eye and judgement in not visiting that site. With regards to a possible block this may work: if your phone allows you to block a contact from your phonebook, create a contact for Slydial using this number - 267-Sly-Dial (267-759-3425)
This may work, and is worth a shot.
Keep us posted if you get any others, or if this helps.
Received incoming message, but never answered because, where I live, there is no cell signal so I have an alternative number that people use (and is actually on my greeting to direct people to the other number). 347 Area code is the Bronx. I have not been to NYC for 30 years, despite living there for 6.