T-Mobile has a new deal for you if you'd like to buy a Samsung Galaxy S7 or S7 edge but feel like receiving something for free alongside that device. Hence, for a limited time if you order one of Samsung's latest flagships you'll also get a Galaxy Grand Prime smartphone (pictured below), which will be free - with a catch though. As is usually the case with carrier deals involving the word "free", you'll get the amount you spent on the Grand Prime back on a prepaid MasterCard. The Galaxy S7 can be yours for $0 upfront and 24 monthly payments of $27.92, or $669.99 if you prefer to pay...
Source: http://www.gsmarena.com/get_a_free_galaxy_grand_prime_with_your_s7_or_s7_edge_order_at_tmobile-news-18245.php