adb reboot bootloader (Unlocking the Bootloader)

on the box my hpone came it it says H815, Made In Korea, I talked to LG they say it's registered in Hong Kong but it shows it's a LG-H815, No T or anything after the 8. So I have a H815. Not sure what the Hong Kong thing means...but I need to unlock the boot loader.

Following this: http://developer.lge.com/resource/mo...yTypeCode=ANRS

On the 'adb reboot bootloader' command it says in CMD, 'error: device 'null' not found'.

I've tried it many times. I can clearly see it as G4 in My Computer, I can go into it and see the folders on the internal memory.

http://i.imgur.com/fZ4t6Rj.png
http://imgur.com/5UBg6dB

I downloaded installer_r24.3.4-windows.exe from here: http://developer.android.com/sdk/index.html#Other

I installed the SDK Manger and installed the Google USB Drive and the Platform Tools, got the 3 files, did the cmd as you see in my image...

I never had to installed the G4 drivers or anything, it just installed it when I plugged it in and always worked.

So...?

Wish someone could help via Team Viewer..