Galaxy s3 nand write start fail odin

Every time I try and flash my bricked s3 i900 in odin I receive this nand error. I have tried using several different stock roms for my device. I have also used several pit files. None of these have worked. Any help would greatly be appreciated.

Odin - NAND Fail - SM-G925F

Hey Guys,

If I have posted this in the wrong place then please move.

I have just recently rooted my S6 Edge and in trying to get EE Wifi calling enabled have managed to royally screw up somewhere. I changed parts of the system folder and found EE wifi calling in the menu. I since then ran my phone for 2 days and only yesterday restarted it (BIG MISTAKE!).

It now only boots to the Samsung logo and remains there and doesn't boot properly.

When trying to run the BTU version through Odin It gets to NAND WRITE START!! and then fails:

<ID:0/013> Odin engine v(ID:3.1100)..
<ID:0/013> File analysis..
<ID:0/013> SetupConnection..
<ID:0/013> Removed!!
<ID:0/013> Initialzation..
<ID:0/013> Get PIT for mapping..
<ID:0/013> Firmware update start..
<ID:0/013> SingleDownload.
<ID:0/013> cm.bin
<ID:0/013> NAND Write Start!!
<ID:0/013> FAIL!

It is an unbranded S6 Edge SM-G925F.

Any help would be greatfully appreciated!

Cheers,
Chris