rooting gone wrong

[Roshux]

I've got a samsung galaxy s7 tmobile version, and wanted to root. went through all the steps and got to odin flash. followed the steps using odin to flash, but my phone got stuck in and endless bootloop. 

 

i fixed the bootloop and managed to get to the recovery boot mode, and wiped the thing factory clean. however, the phone boot logo changed to "samsung galaxy s7 custom" which led me to believe it was no longer stock. my phone ran terribly slow, LTE barely worked, and my texts took ages to send. So I tried to find some new firmware for my SM-G930T, and ran the flash.

 

ive tried with serveral different build dates but every single firmware version of SM-G930T gives me a "FAIL" in odin, and has made my phone completely unusable. If its not in download mode, its in a bootloop in recovery mode, and never passes the "installing software updates" with the moving android icon

 

my phone is completely unusable, and the only thing i can do with it is go into download mode, but none of the firmwares im running are working.

 

i would appreciate any help, ive tried everything i can find on the internet so far and i really hope my 700 dollar phone isnt a brick.

[Coolstrybro]

Where are you getting the stock ROM from?

[Droidbot]

try xda, here is not the place really

[Roshux]

9 hours ago, Coolstrybro said:

Where are you getting the stock ROM from?

mobile forum sites that have different stock roms for different s7's listed. chose SM-G930T and a few different build dates but nothing seems to be working.

[Roshux]

<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/003> Odin engine v(ID:3.1203)..
<ID:0/003> File analysis..
<ID:0/003> SetupConnection..
<ID:0/003> Initialzation..
<ID:0/003> Set PIT file..
<ID:0/003> DO NOT TURN OFF TARGET!!
<ID:0/003> Get PIT for mapping..
<ID:0/003> Firmware update start..
<ID:0/003> SingleDownload.
<ID:0/003> emmc_appsboot.mbn
<ID:0/003> lksecapp.mbn
<ID:0/003> xbl.elf
<ID:0/003> FAIL! (Auth)
<ID:0/003> 
<ID:0/003> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)