needs for unlocking:
* micro usb cable
* Z3x box
Procedure:
* To connect SGH-T999 phone you have to perform the following steps:
* Go to Menu->Settings->Developers Options
* Turn on "USB Debugging"
* When message is appear press "Yes".
* Go to dial window.
* Enter "*#7284#" Go to "Qualcomm USB Settings".
* Select "DM + Modem + ADB".
* Close window.
* open Z3x samsung tool
* select model
* select comport
* click unlock
* wait till finish
screen shot here!!!