How to downgrade S5 to 4.4.2 in order to root?(software is 5.0 build lrx21T.g900VVRU2BPB1)(smg9000v)

[AC Question]

I have tried a lot. My understanding is that if I downgrade to 4.4.2, I can root my S5 easily. The phone refuses to take any software given by Odin (3.10.7). I have turned reactivation lock off, cleared the cache, factor reset the phone, and turned USB debugging on. Ideally, I would load 4.4.2 (I am using G900VVRU1ANE9_G900VVZW1ANE9_G900VVRU1ANE9_HOME.tar.md5 from sam mobile), but would be fine with any method to root. Yes I am in download mode while trying to put the new OS on. The log on Odin is:
"
<ID:0/006> Added!!
<OSM> Enter CS for MD5..
<OSM> Binary Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/006> Odin engine v(ID:3.1100)..
<ID:0/006> File analysis..
<ID:0/006> SetupConnection..
<ID:0/006> Initialzation..
<ID:0/006> Get PIT for mapping..
<ID:0/006> Firmware update start..
<ID:0/006> SingleDownload.
<ID:0/006> aboot.mbn
<ID:0/006> NAND Write Start!!
<ID:0/006> FAIL! (Auth)
<ID:0/006>
<ID:0/006> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)
"

On the phone, the error is:
"
SW REV CHECK FAIL : [aboot]Fused 2 > Binary 1
"

Any suggestions??

 

[xbnew]

Ok this was me. Any suggestions? (also I tried KingRoot)

 

[nahoku]

Duplicate post. See reply HERE