I have a galaxy s4 and I recently switched from Verizon to straight talk using the byop thing, and everything went smoothly. My Verizon galaxy s4 is on straight talk and I get verizon 4g lte on it. My sister has an iPhone 5s on verizon that she wants to port over to straight talk.. The website says it's compatible but the customer service says it's not. If I'm correct the iPhones are GSM unlocked so it would use at&t network. Has anyone done this and can confirm it works? Thanks!