Ok, I have a S4 originally from ATT which has been unlocked (which is used for Tmobile). One day I was messing with it and suddenly it powered off on me and from that point on I was never able to get past the ATT logo screen. The phone has been bricked.
After consulting Google. I've found Odin.... ONLY to see this error.
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> I337UCUAMDL_I337ATTAMDL_I337UCUAMDL_HOME.tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/006> Odin v.3 engine (ID:6)..
<ID:0/006> File analysis..
<ID:0/006> Get PIT for mapping..
<ID:0/006> Firmware update start..
<ID:0/006> NAND Write Start!!
<ID:0/006> FAIL! (Auth)
<OSM> All threads completed. (succeed 0 / failed 1)"
Ok someone please help.