App did not work... Samsung is a joke. To clarify, the app gave one price for a particular phone, with a promotional credit for using the app, but during checkout on "confirm order" the price would change - after pressing confirm. And even worse customer service would not respond to fix the issue. Three times I had to cancel the order before it finally calculated correctly. Why give special promotional offers to use the app if the app doesn't work? Good customer service no longer exists. Some call center in a far away country will be sure to tell you how sorry they are all while they do nothing (and can do nothing) to fix the problem!!