Help Galaxy S3 GT I9300 boot loop

[Rudles]

Hello. Tried looking at the existing threads. No such luck.
I managed to soft brick my Galaxy S3 GT-I9300. I tried flashing to Jellybean 4.1.2, no luck. Tried rolling back to ICS 4.0.4, no such luck. With both I get RESET in the box in Odin. I am unable to get into download mode with the keys but I am able to get it into download mode with MobileTechVideos' download mode jig.
I live in Alaska and my carrier is GCI. A small carrier, not even listed among the carriers at SamMobile. I have called GCI tech support and they do not have a ROM available. My last ROM was Jellybean 4.3 snagged from Germany. I just want a ROM made for a US phone. Seems so simple but apparently not. I see ROMs for all other countries but NONE for the USA I9300.

 

[funkylogik]

Hey mate. I dont think i can help but i know that you shouldnt roll backwards from 4.3.
I dont know what to suggest but i suppose you have nothing to lose by trying some unbranded gt-i9300 4.3 firmwares from sammobile.
The only problem might be the radio firmware (modem) but i honestly dont know.
I have a hard time understanding how carriers work in the US in the first place but the fact that youre in alaska and on a global version of the phone maybe means youre immune to all the crap that goes with having a phone in the US. good luck :beer: