LG G4 KDZ Firmware Restore Unbrick and unroot tutorial

Link to KDZ site

Link to XDA developers thread on firmware restore

Link to LG drivers

Link to LG Flash Tool

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5 Things you need to know before rooting or hacking your android device
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Warning… do this at your own risk. I am not responsible for what you do to your device.
I am happy to help with any problems my subscribers are having on their android devices. I am going to need lots of info from you to be able to help. Because of the large amount of messages I get every day I will not answer any questions that do not include this info in the message thanks for understanding. 1. What device you have. 2. What android version you are running. 3. What rom stock or custom rom / build number in about phone. 4. What you have done to the device. 5. Recovery stock, TWRP. CWM . With this info I will be able to help. 
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[elliotnartey]

Really appreciate your explanation of normal flash and see flash. First time I've seen anybody do it. Always wondered why app developers choose not to use straightforward names and explanations for these things; same goes for content creators; most never seem able to explain things thoroughly enough. Thanks once again

[secure]

You are awesome with this dude. Some corruption happened on my phone and I needed to get back to factory... This did the trick! Thank you!

[konaWH]

thanks mate helped alot. My LG G4 was won from LG Insider competition and would not update via OTA. Was a PITA.

This method worked a treat. Awesome!

[yaroslav.afortunado]

How to unbrick your phone instruction:
1. Turn on phone, go to settings ... WHAT?

[nepobedivititanik]

THX MAN

only flash tool that works

you earned a new subscriber !

[electrobussterr]

Guys if this happened to your phone, then you have to put your phone into download mode and download the LG Bridge tool (LG website). Be sure to set the LG driver properties to COM 41. After you click on the software update tab, it will automatically start downloading / flashing.
This was the ONLY method that fixed my boot loop bricked LG G4 H-815!

[rasa]

tnx man! <3 entire morning i was ''fixing'' problem with fimwere stuck after bad update.. and this helped to solve it like its nothing :)

[xaviera]

Worked perfectly with mine. Thank you so much for making my life easier :)

[devansurf]

Thank you so Much, I had to change up some things in the process to make it work but at the end of the day, your video guided me threw and it fixed my phone. I thank you a lot.

[cooarana]

Thank you! Saludos desde México el único video que me sirvió 😉👋

[xceeder]

oh my god, thank you so much you truly helped me to unbrick my phone I had unlocked the bootloader via lg devs and flashed twrp but every time I clicked reboot it just sent me back to twrp recovery I thought I'd bricked my phone you are a fucking

[vkbyte]

Thank you for sharing this @Rootjunky.

[lochunhin]

I followed the step from the video however a error "Connection to server failed Try again in a moment." showed up. Could you tell me how to solve it?

[FabioJackson]

for me just says contact system administrator

[NicholasJNadon]

If you get CONNECTION TO SERVER FAILED in the LG Flash Tool 2014, do NOT press OK. You can leave that dialog box open while the phone flashes. This will save you many headaches.

[LordBonztie]

it is much preferable to use win7 instead of win8 or 8.1 there is a lot of driver problem with win8 so i tried it on another device and it worked on my other laptop using win7. please don't forget to update your c++

[DavidSantos-omkm]

can you do it twice with the same phone and same computer ? i've done the first time and now (second time) it fails at 9 percent every time . help me please !!!

[EDENXOM]

btw when i tried the kdz method, mine always stop at 9% for no reason. any idea why?

[mikisomogyi]

In the support tool, after the third step(Upgrading your phone), it writes: Required info
cannot be found. Contact the system adminstrator.. Please help

[rafiatahira]

I installed the kdz file on my phone using lg up everything was done well but after that my phone isn't turning on...no logo just black solution guys!!!!