LGH815 STUCK IN DOWNLOAD MODE LGUP unknown model - G4 Q&A, Help & Troubleshooting

i downgrade my h815 with lg bridge from nougat v30 port H-rom to mm with out flash first mm bootloader and now phone is stuck in download mode in 24% in lg bridge, i tried with lgup but is a unknown model, my model now is V300.... after this i tried LGflashtool v1.8.6.527 but filed to load

You can't downgrade from Nougat if you flashed the Nougat bootloader first. You need to flash the previous bootloader.

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LG G4 bricked

Hello,
My friend's G4 (Hong Kong Version, Model H815T) was bricked because upgrading to Android 6.0. I can't get in to the recovery mode. But download mode can access, so I tried flash ROM in KDZ method but the programs fails on 9%. I had tried LGUP also but still brick. Please Help!!! :crying::crying::crying::crying:
More Info:
KDZ file: storagecow.eu/Xda/LG%20G4/Hong%20Kong%20H815T10B_00.kdz
S/N: 505
[UPDATE 1/11/16 2053PST]
I tried flash the system to MM 20A but it will stuck at the boot screen, not looping
[UPDATE 1/12/16 0112PST]
My friend decided sent the phone back to HK LG CS, thank you for all who view this post.

Lg g4 bootloop

my g4 keeps getting stuck in the bootloop and i already flashed stock 20a kdz rom with the lgup software with no success. no warranty HELP!
Phone model number and serial ?

How to downgrade Korean LG G4 F500S from Marshmallow to Lollipop? Which firmwares to

I know the downgrading procedure using LGUP.
I tried downgrading Marshmallow firmware F500S20m and F500S20v to Lollipop F500SAT-00-V11i-SKT-KR-NOV-10-2015+0.tot, but the phone got stuck into bootloop after successful flashing and factory reset did not help.
Upgrading it back to Marshmallow F500S20m made everything work normally.
Which is best website to download LG F500S firmwares?
Successfully downgraded F500S from Marshmallow to Lollipop using this.
https://forum.xda-developers.com/g4/general/tot-lg-g4-korean-f500l-tot-flash-files-t3294417
Firmware used to downgrade to Lollipop: LGF500LAT-00-V11d-LGU-KR-SEP-21-2015+0.tot
However, the model number is now shown as F500L in settings.

need lollipop kdz for f500l

can anyone help me find a lollipop kdz for my g4.it was advertised as an h815 but the board says f500l.i have found MM kdz but cant flash them as flash tool 2014 doesnt support marshmallow and lgup checks phone version before flashing (mine shows h819 for some reason??).also,is there a way to convert tot files to kdz??

LGUP doesn't see my LG G8

I have LG G820QM and I want to flash stock firmware on it. I have LGUP 1.15, I downloaded LG G8 dll and pasted it to appropriate folder. I entered download mode on my phone but LGUP still doesn't see the phone.
What software do you have? Probably the latest. No new update yet

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