Android 6.0 Marshmallow has been officially released for the LG G3 D855. The firmware is currently OTA available so if your device runs on stock Android OS and if it isn’t rooted, you should receive the Android 6.0 notification anytime now. However, if you are tired of waiting or if you phone is rooted or installed with a custom ROM software (in that case you can’t receive OTAs) you can choose an alternative update method: the manual flashing procedure.

Yes, that’s already possible as you can anytime choose to download the Android 6.0 Marshmallow KDZ file for your own LG G3. As you might know, the KDZ represents the official full firmware file of an LG based update that can be downloaded and then manually applied on a LG branded device. Thus, you will update your LG G3 with the same OTA built, but in a manual matter without waiting for the OTA to be spotted.

The best is that this update procedure can be successfully applied by users who have rooted their devices or by using who have tweaked their handsets – thus, you can use this tutorial whether your LG G3 is rooted, running on an unlocked bootloader, installed with a custom recovery image, flashed with a custom ROM and so on. However, being the stock ROM, using the KDZ Android 6.0 Marshmallow file will make you lose the root access – also, you will now relock the bootloader of your phone, reinstall the stock recovery image and reapply all the factory and default restrictions.

That might also be a good thing as you can restore your LG G3 back to its initial state – so, you can get rid of malicious apps, malware and also you can resolve various software related issues such as boot loops, lags, bugs, force close errors, battery drain, heating issues, total blackouts, screen freeze and so on – therefore, you can now learn how to manually troubleshoot a bricked LG G3.

As for the Android 6.0 Marshmallow update, it comes with important stability improvements, bug fixes, with a new UI and with new features, app and capabilities. Moreover, the ROM is stable and it will smoothly run on all the LG G3 D855. Therefore, you have all the reasons for completing this step by step guide.

Anyway, remember that you should use the Android M KDZ file only if you can’t receive the OTA – you can manually force down the OTA by accessing “menu – settings – about phone – software version – check for updates”.

This is a manual update operation that can be completed in an official matter – you won’t lose your phone’s warranty by taking care of the following guidelines. Also, since you will restore your phone back to its initial state you might even be able to restore a lost warranty (for example, when gaining root access the warranty gets void by default, so now you might be able to reclaim it back).

Before completing this manual update operation, backup your LG G3. I know that your data isn’t being removed when applying an OTA but with a manual update operation things aren’t the same – I guess that’s the risk assumed. Anyway, don’t panic as the backup can be easily ensured. All you have to do is to sync your data or use other dedicated backup and restore apps that you can download for free from Google Play. Just don’t forget to save stuffs like contacts, call logs, texts, internet settings, EFS folder, IMEI / NVRAM, images, videos, audio files, market apps and anything else you might use afterwards.

Being a manual installation guide, you can flash Android 6.0 Marshmallow on your LG G3 only if you can use a computer where to download the compatible KDZ file and where to install the actual Flashing Tool. A good idea might be to temporarily turn off any antivirus tool from your computer as your work might be interrupted by such apps. Also, on your smartphone you first have to enable USB Debugging, an option located under “menu – settings – developer options”. Note: Developer Options can be enabled by tapping several times on Built Number, from “menu – settings – about phone”.

On your computer you must have the LG G3 USB drivers installed while on your device you must make sure there is at least 60% power left – else your phone might get turned off in the middle of the Android 6.0 Marshmallow process (so plug in the charger if that’s necessary).

How to Manually Update LG G3 to Android 6.0 using Marshmallow KDZ and Flash Tool

  1. Download the KDZ Android 6.0 M firmware file from this page.
  2. Then, get the Flash Tool from here.
  3. Save both files on your computer, preferable on desktop.
  4. Now, open the Flash Tool folder and transfer the KDZ file there.
  5. Power off your smartphone; wait a few moments and then enter it in download mode – on your way also connect it with your computer with the help of the USB cable.
  6. Run the Flash Tool on your computer.
  7. Then, under Select Type choose CDMA, then choose PhoneMode to CS_EMERGENCY and also load the KDZ file by clicking on the folder icon.
  8. If you are coming from a custom ROM then you should choose CSE Flash (this will also wipe the internal system of your device – a hard reset will be applied while you will also clear app data cache); if stock Android OS is already running on your LG G3 choose Normal Flash.
  9. Click on Start, disconnect from the Internet and also remember to turn off the antivirus protection for a short while.
  10. The update operation should now begin; wait while the installation process runs.
  11. When done, unplug the USB cord and reboot your phone.

Perfect; you have successfully completed our dedicated step by step guide. So, now you know how to manually update your LG G3 to official Android 6.0 Marshmallow, manually by using KDZ and Flash Tool. Enjoy.

Comments
Opis Riga · 2 years ago

D'or LG 373 can be installed Android 6.0 Marshmallow?

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friend · 2 years ago

The link to kdz does not return file download ... :-(

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Sohaib Ehsan · 2 years ago

plz help i bought used LG G3 D855 from market and i came home i see my mobile is rooted there is no super user then i want to unroot this phone i tried to unroot this by kdz method but every time i failed then i want to check the solution and i find out my mobile inner imei or outer imei is different plz tell me what is this and ho to fix this because i want to unroot my phone and update it into android 6 plz any one help

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shaheem khan · 2 years ago

when upgrading it only goes to 2%
then it stops and says to retry
it does not work on d855 -_-

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Aroma · 2 years ago

Does it work on the G3s?

LG-D722

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jc · 2 years ago

does it work for f410s? I am struggling to try this

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Deepesh · 2 years ago

Thanks for giving this wonderful tutorial, I have upgraded my phone and it seems to be working flawless... Very simple steps, crisp and clear explanation.. thanks a ton

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tristan · 2 years ago

will this work for a vs985 verison? i am trying to root my phone but before i do just in case i brick it i will have the original marshmallow software that i started from. will this work?

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james · 2 years ago

kdz will not open in the flash tool

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Email Hadj · 2 years ago

i have g3 d855 10i is these kdz work with me please answer to question becaus i have probleme

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Acrolink · 2 years ago

Works great for my G3 D855.

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Acrolink · 2 years ago

So I understand that the latest official ROM is D85530B_00_1217.kdz .. Is that correct?

Another question, I see after this ROM update that the android security patch level reads 2015-12-01 .. Any updates for this?

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terrytek · 2 years ago

so, if i upgrade the phone manually, will i have to root it in order to upgrade? or can this be upgraded with a stock bootloader?

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asdfasdf · 2 years ago

If I update my G3 to 6.0 will I lose my warranty?

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Hemanth Kalyan · 2 years ago

my phone's version is d85521a. will this kdz work?

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Natsu Dragneel · 3 years ago

My phone is still on Android 5.0 and I'm guessing I'll have to manually upgrade the os is there any guide video because this is my first time and I'm quite scared.

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Natsu Dragneel · 3 years ago

Should I root the phone first?

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Natsu Dragneel · 3 years ago

Since you need to pay for one click root.

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WreckTangle ? ??? · 2 years ago

There are other ways of rooting, and no do not pay for One Click Root..

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Princess · 2 years ago

It is official update and you may loose your root access after any of official update. So first update and then root is better choice

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Joey · 3 years ago

Hi. I have a Verizon LG G3 (VS985). I switched carriers, and so just use the phone as an extra Android device. So since I don't have service on it, it will not receive OTA updates. I want to do the manual update, but can't find anything for my VS985. Will this work on it? Thanks

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Mar · 2 years ago

Did you even update it? in my the same situation(no Verizon sim) but have always received the updates through the Verizon upgrade assistant. It doesn't seem to be pushing the update to me this time around.

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james · 3 years ago

just comes up with ???????????

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eeewe · 3 years ago

Please help

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Johnny · 3 years ago

Thanks for update. updated successfully!

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Shashank · 3 years ago

will the verizon LG g3 in india receive the marshmallow update ..........I got unlocked one

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Vishal Doley · 2 years ago

Is it working without any problems.?? And did you upgrade it.?? If yes then how..?

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Joshua Prescod-Campbell · 2 years ago

No versions besides the D855 can use this update. Verizon, Sprint, AT&T, etc. needs a custom ROM to have 6.0M. The custom ROM I'm using on my LS990 (Sprint) is Xenon HD.

I repeat, ONLY the International Version (D855) can install official LG 6.0 KDZ files.

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furiousbrick · 3 years ago

The tutorial is great,however i do believe I messed up by not turning off the internet connection. I got an error at 13%, took out my battery, tried again, went straight to download mode, got an error at 14%, asked me to take out my battery and i try again. I did as instructed, only this time my G3 never came back on. Hard bricked. I was using the cable that LG provided. Since i was still under warranty,i took it back to LG and got it fixed. Harrowing experience. Be very careful guy.

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Jack Coleman · 3 years ago

Use LGUP, it's as easy as counting 1 2 3.

Flash tool is so complicated!

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Nasir Ali · 3 years ago

Can i upgrade my LG G3 D855 20k with this scenario???

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Yakub Ng · 3 years ago

what does "20k" means?

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Yakub Ng · 3 years ago

this update is valid. tried it on my LGE D855 last night. no bootloop, no lags, no weird bugs on my G3 anymore. love the Android M too. Thanks to whoever contributed to this. GGWP! :D

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U N I KK A T I L · 3 years ago

So you are saying that worth getting Marshmallow and there are no bugs?

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Yakub Ng · 3 years ago

yes if you're upgrading from Lollipop because G3 on Lollipop have too much bugs compared when it's on Kitkat. And my G3 is bugs-free (for now). It may be different for each G3 but mine definitely got rid of a lot of bugs.

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Masoom Rahman · 3 years ago

I'm getting boot loops after it boots up to the knock code screen, you enter the knock code and the phone reboots again and again.

How can i solve this?

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mohamed nasiri · 3 years ago

Thank you for clear and concise instruction, was worried a bit when the program crushed on my PC at 99%, waited patiently for the upgrade to conclude on my phone, and VOILA :-) updated successfully. Thank you again

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Zebedee Boss · 3 years ago

If I upgrade my "Three Mobile" UK Network D855, is it classed as Custom ROM as its supplied by THREE or is it stock ? Please help me choose the right method :)

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x-line · 3 years ago

Thanks a lot. Worked by me.

There is just one thing: If you don't turn off Internet connection after choosing language and before pressing start, you will get an error on 25%. Only thing you can do at this moment is to take out battery on your device. This means that you will not be able to start your phone anymore, cause you don't have any system on it anymore.

What to do in this case. Do all steps LIKE WRITTEN (INTERNET CONNECTION MUST BE TURNED OFF) press start and wait the process to finish.

Thanks a lot for your work.

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Jim · 3 years ago

Great article and instructions. The only thing missing in case it helps others is correct instructions to enter download mode. The instructions given on the link are for G4 and did not work with G3. The simple way to enter download mode on the G3 is to power off and wait for the notification light to go out. Next plug one end of a usb cable into your computer. Next hold down the "volume up" button" and keep held down whilst plugging in the other end of the usb cable into the G3. Keep help down until "firmware upgrade" screen appears. The release.

I also had to change the com port in windows device manager to com41 for the LGE mobile serial port before starting the LG flash tool upgrade but others may not need to carry out this step.

Otherwise worked great - Thank you!

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chodekiran · 3 years ago

Hello,

Can I use the same KDZ file for all varients of LG G3.
I have an unlocked LG G3 Verizon varient. Right now I am in india.
Please help.

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Raveesh RV Layal · 3 years ago

hello sir,
i m also on unlocked verizon...if u got any solution plz share!

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Mar · 2 years ago

did you get a solution?

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