Help!! Dowgrade F500L 21A 6.0 back to 5.1 ??? - G4 Q&A, Help & Troubleshooting

Hi guys!
I need help for go back to 5.1 stock rom.
Thanks for help!

https://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803
Try this maybe

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D855 WITH V20F-AME-XX FIRMWARE needed please help

good day
how do u do
i have g3 32gb inter V20F-AME-XX lolipop 5.0
i want to downgrade to 4.4.2
but i cant found the correct firmware for my V20F-AME-XX
please im afraid :crying:

How to unroot lg g3 d855 running lollipop 5.0

HELLO guys I recently bought an LG G3 2do hand but it came rooted, so I want to go back to stock, it is runnig lollipop 5.0 I donĀ“t know how to do that, because there is a lot of tutorials but altmost all are for kit kat versions, so please guys if you know something about it please let me know, and would apreciate if you explain it in many steps as you can, or guiding me to a lynk or video where I can watch it.. Im native from mexico so if it be in spanish I will apreciate your time, if you cannot translate to spanish there is no problem I will try to do my best..
You'll need to use either the KDZ or TOT method to flash back to stock...
[Guide] LG G3 Stock Firmware (Go Back to Stock) KDZ & TOT Method
http://forum.xda-developers.com/showthread.php?t=2785089

How to update refurbished/simUnlocked LG G3 ?

Hi i buy a g3 for my mother without any garranty ! it is d855 on its pack and software and under battery and all iemi codes are right and same ! but i boot it with stock recovery and i known it is ls990(sprint model) ! in iemi checker site there is ls990 too i think it is refurbished model maybe unlocked one ! i don't have any problem with this that this phone is refurbished or inlocked ... my really problem is that i can'tupdate this phone with stock 4.4.2! there is no update center in setting !
is anyone has sameproblem ?! can you help me please ! i don't want to flash it because i m afraid brick it !
pls help can i flash d855 marshmallow rom on it without any problem?!
erfanzz said:
pls help can i flash d855 marshmallow rom on it without any problem?!
Click to expand...
Click to collapse
First backup ur current rom, efs and modem after that i think u should try fumics rom.
tnx a lot Ali but fumis for ls990 or d855 ?!

downgrade to lollipop

hello,
i have a problem with my lg g3 d851
i would downgrade to lolipop
because i have a problem with battery in marshmalow
please help me !
Lg flash tool helps to downgrade and upgrade
Could someone plz post a decent kingroot apk ?

Lg g3 d855 international with stock Marshmallow,

Hi.. Thanks In advance. ! I have LG g3 with stock marshmallow and I want to root it.. please help me. Kingroot and etc aren't working.. I wanna root and have twrp in it.! I again repeat i am running stock Marshmallow! Please guide me..
In case you need to contact me..
This is my facebook.. /iamasawalwarraich
You need to downgrade first before rooting.
Also use the search function next time https://forum.xda-developers.com/lg-g3/general/guide-how-to-install-lineag-os-t3558777

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