s4 M919 successfully unlock 4.3 with z3x

need root

Selected model: M919

Selected port: COM4 Z3X BOX Serial Port

Selected port speed: 115200

Searching ADB device...

Please, allow USB debugging on phone... OK

Reading phone info...

Model: SGH-M919

Android version: 4.3

Product code: SGH-M919ZWATMB

Phone version: M919UVUEMK2

PDA version: M919UVUEMK2

CSC version: M919TMBEMK2

IMEI: 355537051716225

Phone S/N: RV1D50W3W0R

Checking Super user right... true

Backuping MMCBLK... OK

Writing data to phone... OK

Rebooting phone... OK

Waiting phone...

Please, allow USB debugging on phone... OK

Bypass MSL... OK

Unlocking... OK

Reseting... OK

Unlock done

Done with Samsung Tool v.18.0

via Welcome to gsm-tips http://ift.tt/Y6AWdP