https://www.cnet.com/news/free-iphone-xr-from-sprint-with-eligible-trade-in/

Read more: iPhone deals: Save big on last year's models 

In the meantime, here's the scoop on Sprint's deal: When you preorder an iPhone XR (64GB), trade in an eligible phone and sign up for an 18-month Sprint Flex Lease, the phone itself will cost you $0 -- you pay only for service.