Samsung T339N Unlock done.. 
Selected model: T399N
Selected port: COM93 SAMSUNG Mobile USB Serial Port
Selected port speed: 115200
Waiting ADB device...
Please, allow USB debugging on phone... OK
Reading phone info...
Model: SGH-T399N
Android version: 4.4.2
Product code: Unknown
Phone version: T399NUVUANK3
PDA version: T399NUVUANK3
CSC version: T399NTMBANK3
IMEI: 350695200123951
Phone S/N: RV8FC09B5AL
Checking Super user right... true
Reading modem... OK
Patching modem... OK
Writing modem... OK
Rebooting phone... OK
Repair done