called my cel rang twice and hung up.

Called once and hung up

I was at work when they called at 5:43pm on April 16. Did not leave message.

I get calls from this number almost daily - very annoying. Usually there is no one there.

It's the "Lisa (or Christy) With Reward Redemption" scam.  Been typing this same story for two weeks now.  It alternates between Lisa and Christy.  The scam has been around for several years.  It quiets down for a while then starts up again.  Calls coming in on 11 different numbers that I've tracked in the last two weeks.  Here's some info from Florida on the scam that ran in that state and the link for reporting it.  Apparently "Lisa" is gleaning numbers from web sites visited and (don't know if this is accurate) but a lot of stores such as WalMart, KMart, etc. are asking people for their phone numbers at check out and people are giving them.  So read here and block the number:

Call back gets "Hi, this is LIsa with Reward Redemption...."  It's a big SCAM.  BBB has a warning for consumers.  Read here:   http://www.bbb.org/central-florida/business-r ... do-fl-171532464

If you're on the DNC list, please take a moment to report the call here:
https://complaints.donotcall.gov/complaint/complaintcheck.aspx