This is a scam. The caller is NOT Apple or Walmart. Repeat: This is a scam. Do not respond in any way. Simply delete the message. At least some of these messages are directing people to a malicious site. Do not let curiosity get the best of you.
Please do not post working links to scam web sites. You can break the links like this: www.google (dot) com so that no one accidentally winds up on a malicious site.
Received the same message about winning a free $1000.00 Walmart gift card and asking me to go to a website and enter a code. Although I did not and have no intentions to, I did reply to the text with Stop. Should I have even done that much? I had a friend mention that even sending a reply text to some of these scams can send unwanted charges to your phone bill??? Any comments on this??? My phone bill is the same each month and have not noticed any extra charges on it. Does anyone know how to get your cell phone unlisted???