hey guys! I need some advice for preorder the iPhone 7 in September. I currently have a 5s on Verizon that's off contract. When I go to pre-order would I get a Verizon iPhone? OR get an unlocked version and put my sim from the 5s into the 7 (I'm not even sure if they offer an unlocked version for pre-order?) Sorry for the noob questions lol. I've only preordered an Apple Watch, and there's no carriers involved lol. Thanks!