I received a text message on my cell phone on Friday, May 4 2012 stating that I've just won a free $1,000 Walmart gift card. Enter "FREE" at http://www.walmart.com.myfreecard.biz/claim. Walmart has a $1,000 sweepstake for taking a survey, which I have entered once in a while. However, I've never used my cell phone number for the survey. This obviously is a scam.