Samsung J200F & J200GU unlock file free download link available on needrombd.com . This method was tested on Z3x Samsung Tool Pro. This File allow allow you to unlock and reset Samsung J200F & J200GU . Just download those file and flash it using z3x and enjoy.
Follow The instruction to root samsung J200F & J200GU :
Step 1: Download twrp-2.8.7.0-j2lte.img.tar and Flash it using Z3x or odin.
Step 2 : After Flash go to recovery mode and install BETA-SuperSU-v2.62.zip img file .
Step 3: Now surely you will got success no error will come and device got root access 100%. After root you can easily unlock your device with any Samsung unlock tool.
Waiting ADB device… OK
Reading phone info…
Model: SM-J200GU
Android version: 5.1.1
PDA version: J200GUDXU1AOK1
CSC version: J200GUOLB1AOK1
Phone version: J200GUDXU1AOK1
Product code: SM-J200GZDDXME
CSC country code: MALAYSIA
CSC sales code: XME
Phone SN: R28GC3QQQ8M
IMEI: 354914079089649
HW version: MP 0.300
RF cal date: 20151225
Chip name: EXYNOS3475
Modem board: SHANNON308
Security patch: 2015-11-01
Boot Warranty bit: 1
Checking Super user right… false
Root your phone manually and then repeat