Locked from AT&T
Need Root First... (Towelroot/SuperSU Root Combination will not work without Flashing Patch Kernel)
Tools we Need:
Octopus Samsung tool
Micro USB
SGH-i337 4.4.4 Root
Download po muna natin yung SGH-i337 4.4.4 Root
I337_NC1_Stock_Kernel.tar.md5
I337_NJ4_Stock_Kernel.tar.md5
Odin_v3.10.0.zip
Towelroot.rar
Install SuperSU to manage root access
Put Phone in Download Mode
Vol Down+Home+Power then Flash
I337_NC1_Stock_Kernel.tar.md5
on Odin (AP/PDA)

After ma-Flash phone will Reboot
Install Towelroot.. Open Towelroot and click/tap "MAKE IT RAIN"... after that... Install SuperSU...
After mainstall SuperSU... Flash I337_NJ4_Stock_Kernel.tar.md5 on Odin (AP/PDA)

Done on Rooting....
Proceed na Tayo sa Unlocking...
Enable USB Debugging by Tapping Build 7x on Settings/About...
type *#0808# choose DM+MODEM+ADB...
wait lang mainstall lahat ng Drivers....
Open octopus samsung tool Choose the Right Model...
then Click Unlock....


Done..
pero sa z3x if activated no need to root na eh
)
Need Root First... (Towelroot/SuperSU Root Combination will not work without Flashing Patch Kernel)
Tools we Need:
Octopus Samsung tool
Micro USB
SGH-i337 4.4.4 Root
Download po muna natin yung SGH-i337 4.4.4 Root
I337_NC1_Stock_Kernel.tar.md5
I337_NJ4_Stock_Kernel.tar.md5
Odin_v3.10.0.zip
Towelroot.rar
Install SuperSU to manage root access
Put Phone in Download Mode
Vol Down+Home+Power then Flash
I337_NC1_Stock_Kernel.tar.md5
on Odin (AP/PDA)

After ma-Flash phone will Reboot
Install Towelroot.. Open Towelroot and click/tap "MAKE IT RAIN"... after that... Install SuperSU...
After mainstall SuperSU... Flash I337_NJ4_Stock_Kernel.tar.md5 on Odin (AP/PDA)

Done on Rooting....
Proceed na Tayo sa Unlocking...
Enable USB Debugging by Tapping Build 7x on Settings/About...
type *#0808# choose DM+MODEM+ADB...
wait lang mainstall lahat ng Drivers....
Open octopus samsung tool Choose the Right Model...
then Click Unlock....


Done..
pero sa z3x if activated no need to root na eh
)