Hello, I have just bought a Galaxy S4 i337 unlocked from Amazon. Still on 4.3 and MK2 firmware. I have rooted it and successfully installed Safestrap. Which roms can I flash with it? Also, when I flash a custom rom will I lose the Sim unlock and is there something I can flash to unlock it if so? I will be using this on Straight Talk. I know there are threads about these things but I keep finding different answers. I appreciate any help. Thank you.
