DOWNLOAD THE PRE-ROOTED FIRMWARE
FLASH USING ODIN ( 3.10.7 VER I USED )
After FLASH, Turn ON Phone and Update "superuser" using WIFI
STEP 2 — UNLOCK
Enable USB debugging in phone
Unlock in Octopus 😉
Restart phone. ( Don’t take battery, Restart )
Enter 00000000 when unlock code asked
Important Note– This firmware is a rooted one. 2 error reporting messages will appear. Just press OK. Works fine. Tested.
If you try to install Original firmware, phone gets stuck in " emergency update window" — Flashing will always "fail" in odin — To solve it " Reset FRP in Octopus"