HOW TO UNLOCK sm-G6000 BOOTLOADER PLEASE HELP

[KHOKHARx]

HOW TO UNLOCK sm-G6000 BOOTLOADER PLEASE HELP
INSTALL CROM UNLOCK.APK
AFTER try TO UNLOCK BOOTLOADER
UNABLE TO OPEN APPLICATION ERROR
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[faisal]

same with me also, (unable to open application) i try to flash many other official Firmwares but same problem please any expert help me