LG G3 LS990 Boot Modes

ebsf

New member
Jul 12, 2018
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I have been looking for a definitive listing of boot modes for the LG G3 LS990 but haven't found much.

What I've found so far is:
- Normal Mode.
- Recovery Mode.
- DIAG Mode.
- Download Mode.
- Safe Mode.

What I haven't found is any references to the following standard Android boot modes:
- Bootloader Mode.
- Fastboot Mode.

Except possibly in references to invoking these via ADB.

I also note that Download Mode is not a standard Android boot mode.

The big question is: What is the LG Download Mode, really? Is it Bootloader or Fastboot under a different name? Having invoked Download Mode, will the device then take fastboot commands from a console attached by USB? If so, which drivers must one run for the console (actually, the ADB server) to connect with the device?

If the LG Download Mode is not really Bootloader or Fastboot, then can one enter either of those modes from the device (e.g., by pressing hardware buttons)? (Bootloader may be available from the stock Recovery menu, I recognize). In the same vein, can one enter DIAG mode by pressing hardware buttons?
 
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