HOW TO (temporarily) DOWNGRADE BACK TO OREO FOR BOOTLOADER UNLOCK
(or DOWNGRADE BECAUSE YOU DON'T LIKE PIE)
1) DOWNLOAD FIRMWARE AND DEV PATCHED LGUP
* Download
Oreo KDZ you wish to install -- for bootloader unlock would be US998 20a or 20b.
(If you just don't like Pie, then choose the most recent Oreo KDZ in that thread, which is US998 20h at the top.)
*
DOWNLOAD THIS DUAL VERSION OF DEV PATCHED LGUP, made by @tecknight:
https://androidfilehost.com/?fid=11410963190603845019
(Or use
attached file from bottom of this post. Thanks to
@tecknight! Please
go here and click the THANK BUTTON!)
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2) INSTALL DEV PATCHED LGUP
1. Extract LGUP_DualMode.zip to a folder on your PC.
2. Browse into the folder and launch LGUP_Store_Frame_Ver_1_14_3.msi.
Follow the prompts to complete the install.
3. In that folder, right click and select "Run as Administrator" on "
SetDev.bat" to set LGUP to developer mode
4. Launch LGUP using the desktop shortcut.
Choose Process :
PARTITION DL or
REFURBISH
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3) DOWNGRADING ANY LG V30/V30+/V30S TO EARLIER OREO KDZ FIRMWARE
1) Go into download mode (power off completely, then hold volume up button while plugging in USB cable)
2) open patched LGUP and flash OREO KDZ to DL PARTITION mode. In the pop up box "Select All". Use the attached patched LGUP in this post.
You can also use REFURBISH mode, if you wish.
3) Master Reset (
post 101 of Frankenstein thread)
5) DONE.
It's fairly easy. Most people breeze right through this. But if you have any problems, go through this list:
- Make sure you in download mode BEFORE opening the patched LGUP file.
This is at the top of the list as some people forget to do that. The remainder are in no particular order. If that doesn't work,
- Try different USB port,
- Try different USB cable,
- Try different computer.
- Reinstall LG mobile drivers on your PC.
- Reinstall dev patched LGUP again, making sure the files are placed where they need to go (LG Electronics folder, etc).
- Reboot the computer.
If you ask for help, that's the list of items we are going to give you anyway.
WARNING: In LGUP do NOT go messing with modes not mentioned in these instructions. Especially do NOT use Chip Erase.
https://9to5lg.com/lgup-1-15-manual-how-to-unbrick-restore-your-lg-devices-with-lgup/
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4) IF YOU NEED TO UNLOCK BOOTLOADER (with early Oreo), GO READ WTF INSTRUCTIONS