[Q] I think I bricked my att s4 topic

Hi everyone I have an att s4 that i was able to root and install safe strap, I did not make any back up and accidently install a tmobile insane kikkat on it, now the phone wont boot it just stays on the s4 screen, i try to unroot it using odin but it fails every time, I am lost can anyone tell me if I could still fix this phone or is completelly bricked, thanks in advance for all your help, I am able to get into the bootstrap