I thought people were saying it is difficult to sell and iPhone 6 because you had to make sure the seller didn't have their ID in it. But if you want to sell your iPhone 6 or in my case wipe it clean for exchange, all you do is reset it? Btw, I bought my phone about 10 days ago. Can I still exchange it for a Plus? Even if I've used it? Incidentally mine is one of the iPhone 6's that clicks when you press one of the corners because it's not glued / sealed properly. Quite annoying. There's a guy on youtube with the same issue. His is on the left side too! What bad luck! https://www.youtube.com/watch?v=Ra2_uR1_Ejs Unfortunately I can't get a replacement or Plus as there's no stock.