procedure:
* download this root file https://www.mediafire.com/?gt8tn28m5hlsw59
* download super user v2.46 https://download.chainfire.eu/696/supersu/
* put super user v2.46 into internal storage
* flash the root file using odin 3.10 uncheck auto reboot
* after flashing make twrp mode by pressing home + volume up + power
* select super user v2.46 into internal storage and swipe for updating
* open z3x v27.3 and select correct model
* click unlock
done
note:
if you experienced like this after unlock
just type 12345678 for pin
for puk just type 00000000 for network puk
* download this root file https://www.mediafire.com/?gt8tn28m5hlsw59
* download super user v2.46 https://download.chainfire.eu/696/supersu/
* put super user v2.46 into internal storage
* flash the root file using odin 3.10 uncheck auto reboot
* after flashing make twrp mode by pressing home + volume up + power
* select super user v2.46 into internal storage and swipe for updating
* open z3x v27.3 and select correct model
* click unlock
done
note:
if you experienced like this after unlock
just type 12345678 for pin
for puk just type 00000000 for network puk