hi i recently rooted a sprint s4 and it was working but then i wanted to sim unlock it. So i first changed the baseband to try to be able to get it sim unlocked. But that didn't work so then i put a custom aosp (i think it was cyanogemod on it) and then i realized that by doing that i wouldn't be allowed to sim unlock it following the methods on xda forum. So i tried to then flash a stock samsung rom and then thats when an error occured and now I am soft bricked. I wanted to know how can i get it back to working and then sim unlock it so i can have my grandma use it as a phone on tmobile network.