Moved over to virgins root forum :thumbup:
I see that the return to stock thread isn't working for you, I found this and it may be able to help you
How to Install,Return Back Original Stock ROM/Firmware on Samsung Galaxy S3 (S III GT-I9300, U.S and Canada) | Android Firmware Update
States that bells stock odin will work with VM as well.
I actually just gave this a shot and it was a no-go for me. Got about 10 seconds in and returned:
<ID:0/013> Added!!
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> KIES_HOME_I747MVLDLK4_I747MOYCDLK4_538866_REV04_user_low_ship.tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/013> Odin v.3 engine (ID:13)..
<ID:0/013> File analysis..
<ID:0/013> SetupConnection..
<ID:0/013> Initialzation..
<ID:0/013> Get PIT for mapping..
<ID:0/013> Firmware update start..
<ID:0/013> sbl2.mbn
<ID:0/013> NAND Write Start!!
<ID:0/013>
<ID:0/013> Complete(Write) operation failed.
<ID:0/013> Added!!
<OSM> All threads completed. (succeed 0 / failed 1)
On the phone side it gave me "SECURE CHECK FAIL : sb12" (or sbl2, the font is really small.) Any advice?
EDIT: Ok, found the correct file for this. Hotfile takes forever so I've taken the liberty of throwing it on google docs. Open Odin, plug in your GS3 and boot it into download mode, flash the PDA file, and you should be good to go.
DOWNLOAD:
https://docs.google.com/file/d/0BwL_l8A9yhK_WWJlcVAwWlNXWDA/edit?usp=sharing
