This specific file ( KC2 H6113AI 191123V237 BOOT VBMETA.rar ) appears to be a specialized firmware component for a specific hardware build (likely a MediaTek or Spreadtrum/Unisoc based smartphone or tablet).
This process varies wildly by manufacturer. Skip to Step 3 if your bootloader is already unlocked. Step 3: Flash via Fastboot (Standard Method)
: Confirm your device settings match the exact file name.
Most modern Android devices require an unlocked bootloader to flash custom or modified partition images.
: Flashing or unlocking bootloaders will wipe your device.
If your device supports standard Fastboot flashing, follow these steps: your device completely.