Hey guys! Hopefully you can help me. Today the apple store replaced my iPhone 5 because the buttons didn't feel right. Turns out it was bent. But they replaced it! YES! So here's what I'm thinking.... Would it be terribly difficult to sell this new phone and get the 5s instead? (I find that 16GB is too small for me also, so good chance to upgrade there too.) Gazelle looks like they'll offer me $262... That's... decent? Big question mark to me is how then to buy a 5s. Do I need to keep my sim and plug it into the new one? So does that mean I need to get a contract-free phone? Unlocked? I have not a single clue... THANKS IN ADVANCE!