https://www.cnet.com/news/best-black-friday-deals-2018-iphone-xr-xs-xs-max-8-8-plus-se/

You'll pay full price for the iPhone X, iPhone 8 or iPhone 8 Plus, but a $400 gift card is hard to pass up if you're a frequent Walmart shopper. You'll need to activate through AT&T, Sprint or Verizon. 

In-store only: Nov. 22 at 6pm through 23. Schedule an activation appointment at 6pm. Activations begin at 8pm.