Tried to Root, Failed and now brick?

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http://forum.xda-developers.com – Hey guys, I'm new here and im really new to Android, i decided to switch over from apple because they are lame... I bought a samsung galaxy s3 AT&T 16gb, roughly 2 n a half weeks ago. I was looking at the OMEGA rom and i read that i had to be rooted first so i tried to root my phone and when i used odin, it said my phone was incompatible with the root file. I then unplugged and tried to reastart my phone but it put me at the recovery screen that says i need to plug my phone into kies for restoration, i did that and my phone wasn't detected... It wouldn't let me start the phone back up and (HowTos)