Bricked my phone and need help
So, I've recently wanted to use a custom ROM for my phone, and I have done this before, but there's a bunch of changes I guess. I thought that "unified s3" meant that the ATT variants and others (including my i747m) would be compatible, so I tried to flash "Liquid Smooth v3.0" ROM but it didn't work with TWRP. So I got CWM and restored my phone (also my restore file by accident) so my phone was totally wiped, but I could flash the ROM. The problem occurs here, the phone WILL NOT boot, it is stuck at the "Samsung Galaxy S III" splash and won't go past it. I cannot delete the cache or anything without the phone restarting itself. I tried to flash a modem with Odin but get an error also.
I've been searching the forums for a way to fix my i747m but I cannot find anything. Any solutions or is my phone dead. Also I can get into both recovery and download screen. I cannot flash a stock ROM because another error pops up. And when I go into download mode and flash, the "QUALCOMM SECUREBOOT: ENABLE" turns into "SECURE CHECK FAIL : aboot"