Sprint is offering a 64GB iPhone 8 for $0 a month if you trade in an iPhone 7 or 7 Plus or one of Samsung's 2017 flagships - Galaxy S8, S8+ or Note8. Those... are not cheap devices to trade in. And to be clear the "$0 a month" is after you get $29.17 in credit for the 18 monthly payments for the Sprint Flex lease. You still need to activate a new line, so it's not exactly free. The 256GB version or the larger iPhone 8 Plus are not part of this promo. However, if you've already pre-ordered a 64GB iPhone 8, you haven't missed out - you can trade in a device to get the...
Source: http://www.gsmarena.com/sprint_iphone_8_deal_with_tradein-news-27331.php
