Who called from 6692010151

called and left no message, when I called back, fast busy signal

Not a good idea to call these numbers back. It can result in more calls.

Called my cell phone. I answered and there was a moment of silence and then the call dropped or they hung up.

Was expecting a call, so I answered. Recorded message started with "Google, Yahoo and Bing have front page placement..." then I hung up and blocked the number.

They called my cell, no message.