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[Help] Unbricking GS3 and Installing Stock Firmware

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DTUMan

Lurker
I had bought a GS3 a few years back but never used it. Had some carrier issues as all the SIMs here in India were not supported. Ever since I bricked my Moto E, I decided to start using it again.

I realised that the sticker on the rear of my phone says it's I9300 (International Version) of the S3 but the firmware and bootloader in downloader mode shows it as SGH-747 which I believe is the d2att device. I decided to try and flash the I9300 bootloader and flash the I9300 firmware using Odin to sort my carrier network issues (modem difference issues maybe). Ended up causing a hard brick on my phone didn't turn on properly.

I used the bootloader debrick image from: https://androidfilehost.com/?fid=23501681358549813 and was able to boot my phone into download mode. I assume it's the I747 image which helped me turned on my phone although the battery and rear panel says it's I9300. Nevertheless, I downloaded the 4.0.4 firmware from AndroidMTK.com to flash on my bootloader to completely debrick the device. Downloaded the I747 as the debrick I downloaded earlier bootloader is I747 one.

I tried flashing the firmware and get the below error:

Code: 
WARRANTY BIT: 1
BOOTLOADER AP SWREV: 3
SW REV CHECK FAIL: Fused 3 > Binary 0

Is my bootloader a Kitkat Bootloader? Am I flashing the wrong firmware? Should I flash the 4.4.2 firmware and see if it works? Would really appreciate if anyone could guide me here. I really want to unbrick my phone.

I can access my TWRP by using the debrick image from a SD Card. I tried booting into TWRP and Flashing CM 12.1, Lineage 14.1 and Slim 6. I have previously used these three roms on the device. Now, they won't boot after getting installed. I'm stuck at bootlogo when rebooting. Would appreciate any help.
 
Hello!
Are you using ODIN to flash the firmware? I usually recommend Sammobile.com for the latest firmware and the correct version of ODIN for flashing firmware.
You can still boot into download mode?
 
Jfalls63 said:
This is 4.4.2 NE4 and I successfully flashed on 3 devices that was on rooted NJ2.
Click to expand...
I was told that since the WARRANTY BIT: 1 appears in my bootloader, my bootloader version is 4.3 or above. In that case, can I flash the files from post #3 using Odin? All 4 of them need to be flashed right?
 
If you are sure that it is a SGH-I747, these should work. I was surprised when I used them that the flash was successful because normally, you cannot downgrade firmware.
Yes, use all 4 parts, putting each in their slot in Odin.
 
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