Samsung S3 i747m Andriod 4.4.2 Rot And Unlock 100% Done By Samsung Tool v.18.0

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Download above file and follow the instructions
1- root the phone with CF-Auto-Root-d2can-d2vl-sghi747m using odin
2- install recovery recovery-clockwork-touch-6.0.4.3-d2att using odin
3- update superUS with UPDATE-SuperSU-v2.02.zip from the SD card using the recovery clockwork (install zip from sd card)
4- After step 3 recovery will ask you to fix root so apply the fix .

use the latest version of z3x and select *#0808# dm+adb+mtp mode .
select the samsung mobile usb port
in the unlock tab select new security and click unlock.

Selected model: I747M
Selected port: COM299 SAMSUNG Mobile USB Serial Port
Selected port speed: 115200
Searching ADB device...
Please, allow USB debugging on phone...
Please, allow USB debugging on phone... OK
Reading phone info...
Model: SGH-I747M
Android version: 4.4.2
Product code: SGH-I747RWBTLS
Phone version: I747MVLUFNE6
PDA version: I747MVLUFNE6
CSC version: I747MOYBFNE6
IMEI: 353xxxxxxxxxxx
Phone S/N: R21xxxxxxxx
Checking Super user right... true
Backuping MMCBLK... OK
Checking phone at COM299
Backuping NVM... OK
Writing data to phone... OK
Rebooting phone... OK
Waiting phone... OK
Bypass MSL... OK
Unlocking... OK
Checking phone at COM299
Restoring NVM... OK
Reseting... OK
Unlock done
Done with Samsung Tool v.18.0