tmobile to metro odin nand fail

i have s6 i bought and found tmobile dont run in my area and want to flash im trying to unlock the phone and ever time get nand fail. i am going by the samunlocks guide. and using there md5 file anything im missing.

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Enter CS for MD5..
Check MD5.. Do not unplug the cable..
Please wait..
G920T1UVU1AOCH_G920T1TMB1AOCH_G920T1UVU1AOCH_HOME. tar.md5 is valid.
Checking MD5 finished Sucessfully..
Leave CS..
Odin engine v(ID:3.1005)..
File analysis..
SetupConnection..
Initialzation..
Get PIT for mapping..
Firmware update start..
SingleDownload.
sboot.bin
NAND Write Start!!
FAIL!

Complete(Write) operation failed.
All threads completed. (succeed 0 / failed 1)
Removed!!

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