Received unsolicited call to cell-phone which I let go to voice mail.  Caller left voice message which was (subjectively) styled to sound like a personal call about some "account transaction".  However, voice-mail recorded the message about half-way through, so there was no way to know what was said in the first half minute or so; this indicates the caller was a pre-recorded announcement and not a real human.

At the end of the recording, the caller left a call-back number, the same one reported here as caller-id.  I'm guessing it was a phishing scam of some sort.