LG G6 recognized by ADB, but NOT by fastboot

I'm trying to unlock the bootloader on my LG G6 (specifically LGUS997) phone to enable root access. Following LG's instructions, I've downloaded the command line Android SDK tools, notably ADB and fastboot.

ADB recognizes my phone just fine but in order to unlock the bootloader I need to reboot the phone into fastboot mode (which ADB can do). The problem is fastboot.exe does not recognize my phone at all, even after installing the Google USB drivers as well as my phone's specific drivers.

All of the solutions I've found online are to install the drivers I've already installed, or to enable USB debugging (which I have done).

For clarification, I'm using 64-bit Windows 10.

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2 Answers

It was a driver issue for me, however I prefer to only use trustworthy sources. So:

  • Download from
  • Plug your phone in, boot it in fastboot
  • Open the Windows Driver Manager
  • There should be an unknown Android device -> update drivers -> search locally -> choose from list from your computer -> Show every device -> Select the "android_winusb.inf" you just downloaded -> Select "Android Bootloader Interface" -> if warning, still contiune -> finish, now fastboot did work for me.

Download and install this from here. I use this all the time. You won't have to do anything before/after that. Install and open it from start menu.

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