[Q] Downgrade S3 T999 from 4.3 to 4.1.1
I need to downgrade my Samsung Galaxy S3 T999 from 4.3 to 4.1.1 in order to unlock it.
However, when I attempt to flash with Odin 3.09, It repeatedly fails. I am using T999UVDLJC obtained from sammobile.com
My S3 was rooted, but when the flash would not work, I removed SuperSU to see if that would make the flash work. My phone is now unrooted, and the flash still will not work. Knox is removed on my phone.
Should I reroot my device? Should I downgrade to 4.1.2 first?
The Odin log:
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> T999UVDLJA_T999TMBDLJA_T999UVDLJA_HOME.tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/004> Odin v.3 engine (ID:4)..
<ID:0/004> File analysis..
<ID:0/004> Get PIT for mapping..
<ID:0/004> Firmware update start..
<ID:0/004> NAND Write Start!!
<ID:0/004> FAIL! (Auth)
<ID:0/004> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)