yashsingh1/xdaforums huggingface dataset:
[G2 Android Development] lkgonzales:
Need HELP! LG Flash Tool Error when started

I'm trying to flash stock firmware on my malfuctioning LG G2. I installed LG Flash Tool 2014 and also installed Visual C++. I still get the same error. When i run the LG Flash Tool 2014 i get this pop-up: "lg flash tool 2014 LG usb/parallel lock key is not detected" then when i click okay it asks for a username and password. since i have none, i get an Authentication Failed!

My G2 is my only phone right now and i need to fix it. Please assist!

Thanks so much.
[G2 Android Development] v_admanathan@yahoo.com:
tried to flash 10i. i got into flash tool followed all of your instruction.... while upgrading exactly at 4% im getting pop up saying "Connection to Server failed" now my phone stucked in download mode itself even after restarting....someone help me its urgent
[G2 Android Development] beandroid9:
Same thing happened to me. but previously when I used it flashed right away without any errors. Now getting error of Server connection failed. please help me. Also if possible can anybody give me copy of old version of the tool if possible. yesterday tried with 03/07/2014 build.
[G2 Android Development] Nicolo234:
Disconnect your pc from any connection (wifi ecc) before starting to use lg flashtool.

Or if you're using windows 8/8.1, activate the airplane mode, then start.
[G2 Android Development] deathsquad737:
Its cause you failed to replace megalock dll

WHATSAMATTA U ALUMNI
[G2 Android Development] galaxy76:
it is better to use KDZ or lgflashtool or SmartFlash for flash ROM LG?

honestly I never realized that there are advantages between the 3 programs? someone can tell me if one of these programs is better and why?
[G2 Android Development] basti2909:
I believe u when u said all works but i cant get over 2% in flash tool. Tried 2 pcs 6 usb ports and 3 different cables and three driver versions. The one included in op,latest from lg and one older one i used with the old method with editing host file etc. No success
[G2 Android Development] fundoozzz:
Thanks a lot..worked fine without any glitches. D802, Win 8.1 64 bit

I assume that i have lost my custom recovery after flashing this and i will be able to take OTA's now?
[G2 Android Development] Rock-Ace:
Thanks a lot bro... This is what all lg mobile owners were looking for !!! :)

Hi,

you saved my mobile and also for a lot of other users like me this tool would be a medicine. I always wanted an easy LG tool like that of Samsung to upgrade/downgrade my ROM and at the same time remove any errors. Thanks a lot :)
[G2 Android Development] Zachary droid:
heellppp

i keep getting

LG USB/parallel lock key is not detected, what does that mean..
[G2 Android Development] deathsquad737:
That means you didnt replace megalock dll

WHATSAMATTA U ALUMNI
[G2 Android Development] russells.android:
2%

also getting stuck at 2%. guess my luck (and patience) is running out with this phone now...
[G2 Android Development] Zachary droid:
I finally got mine to update 10m with this method, it took awhile, but it worked, alot of headaches, so i feel fort the people not being able to get it to work right away..,
[G2 Android Development] russells.android:
anybody got the older version? getting frustrated with the latest one. maybe the old version will fare better. tia.
[G2 Android Development] Delphinus3:
downgrading

few questions befor i start:

1. i have LG G2 D802 32gb, and running cloudy stock 2.5 4.4.2 and i want to downgrade to 4.2.2. how do i do that?

is the CSE flash will automaticly flash 4.2.2? or i need to choose something?

2. will CSE flash will erase all media too? pictures, videos, music etc?
[G2 Android Development] Rapoooo:
I have a problem while flashing so that it stops me at 2% and still does not want to go as I please any help :(
[G2 Android Development] Smart.Phone:
Error when updating LG flex D950

Hi ,

I have At&T model of LG Flex , trying to update the phone using in windows 8,1 and available .tot files but but tool stops to respond and raise error at 30%

Any idea? any help must be appreciated

Regards
[G2 Android Development] abdel12345:
Used this to get to stock today. It didn't fix my issue (touch issues) but just wanted to confirm 100% that it was hardware and this this did that. Great guide and worked well thanks!
[G2 Android Development] grean:
work fine lg g2 v20f w8.1

(Launch upgrade right click and run as administrator)

tanks!

to downloadKdz:

1- Launch LGMobile Support Tool and press upgrade... wait the download start but disconnecting phone and

wait download 100%

after go

(w8.1): C:\ProgramData\LGMOBILEAX\Phone\D80220F_00.kdz (is hidden folder)

:D :D :D: D
[G2 Android Development] polux400:
Hello. I have a problem with this flash, I got stuck at LG logo after performing flash "Europe OPEN D80220D_00.kdz" on my new D802.

I have seen on the first post that I have to perform a hard reset after the flash, I did it but after the reboot, still stuck on LG logo...

Any help please ?
[G2 Android Development] teacher77:
HI all,

is there anybody who used this tool with an encrypted E975? Does it work? Normal flash, CSE flash or both?

Any help would be appreciated. Thanks in advance.
[G2 Android Development] Oniska:
one of the greatest tools i have used on my g2
[G2 Android Development] saint_cow:
I flashed back to stock kitkat via kdz and now when I reroot and install custom recovery I get a boot loop. I've tried flashing recovery numerous ways from the forum but nothing works. Any clues?
[G2 Android Development] Wezurii4694:
Hello, I'm currently on the latest D800 (D80020y) update, and I was wondering if it's possible to flash the previous update (D80020u) without wiping my phone. Thanks.
[G2 Android Development] grean:
first upgrade normally by the guide after use CSE (function) it perform a factory reset ! :P (to download mode vol- and power Keys witch cable usb connected)
[G2 Android Development] kt-Froggy:
Just wanted to say that this tool worked flawlessly (again :)), when I had to reflash my phone multiple times to fix the digitizer issue. :)
[G2 Android Development] Sagar LP:
before 100% complete my device reboots and a screen comes to select language and more what we generally get after factory reset but iam having problem with touch.so i can not continue further .wht should i do?
[G2 Android Development] aftergr:
i cant flash with my l9 ii

installed all the drivers but when finishes extracting the kdz then it stops
[G2 Android Development] 4everAnoob:
I thought your device was dead lol? Or did you fix it now? I advise you to take care messing around, unless you have no other option

---------- Post added at 04:23 PM ---------- Previous post was at 04:09 PM ----------

Well crap, now my device is acting up. It finished flashing 100% but now it has been stuck on the Android robot screen with the spinning thing in the middle and the progress bar at the bottom for like 5 minutes??

EDIT: OK, it just seems to take that long... it works now.
[G2 Android Development] navispidey:
Stuck at 49%

Whenever i try to flash KDZ rom it get stuck at 49%, is there any solution for this
[G2 Android Development] paradonym:
CDMA is definitely for CSE-Flashing? Not the difference between CDMA and GSM phones?

So I can downgrade+stock-reset my international D802 from 4.4.2 Knock Code to 4.2.2 only with Setting it to CDMA, Phone Mode Diag and CSE Flashing that stuff?

Because in Versions before this tool we had to select 3GQCT also for downgrade-reset...
[G2 Android Development] DurbanPoison24:
I need some help.

Hey all, I just installed this ROM and all seems well but for my homepage there are only 2 pages available and I have no idea how to add more pages.. I'm use to my 5 homepages.. Any help please??
[G2 Android Development] :
I used this twice to unroot before and take OTA updates. I used CSE flash both times with no problems. This last time I tried to use CSE option and it didnt't work so I used normal flash and it worked fine I guess. I tried to do all these fixes people were posting but nothing works. I get a dialog that says "please install CSMG B2C client tool" even after trying all the work arounds. What is the big difference between the 2 different options? It says Normal doesn't wipe data but I did a factory reset after anyways so doesn't that wipe the data anyways? Is running normal flash and doing a factory reset the same as CSE or does it do something different?

Edit: I just did a system restore on my PC and now CSE flash works. Weird.
[G2 Android Development] :
Can someone help me? I am using lg flash tool 2014 on windows xp. I have the proper kdz but once I press start in normal flash or cse flash, it doesn't bring up the language information screen to start it. It just returns to the prior screen. Any help would be appreciated.

Edit: Do the port settings matter in this method. mine is set at port41
[G2 Android Development] deathsquad737:
Did you replace your megalock dll?
[G2 Android Development] :
Yes, I did. I ended up using the old flash tool method! Thanks for your help anyway (:
[G2 Android Development] brockyneo:
hi guys can anyone confirm that i can flash a stock uk unbranded rom over the uk vodafone branded rom?
[G2 Android Development] muertecaza:
Thanks

Just wanted to say thank you, helped me come back from a systemui crash caused by me messing with the program.
[G2 Android Development] TylerDurdenK:
I used this tool to upgrade to 10l on my G3, and even though I selected "Normal Flash" it still reset my phone.....
[G2 Android Development] veronesi.n:
Wrong section, post deleted (question over G3 flash )

Have a nice day all ;)
[G2 Android Development] ohad129:
Its not working for me at all always got the error massage i try to update no no its the word
[G2 Android Development] Tyler27:
i am currently on 24a, can i reflash 24a without losing any data, i have a ton of features that stopped working
[G2 Android Development] ohad129:
24a?
[G2 Android Development] RandomPooka:
Vs980?
[G2 Android Development] ohad129:
Im on lg flex 958 and im try to use it its always crash on me help
[G2 Android Development] RandomPooka:
Wasn't sure. I know the G2 on vzw was at 24a a while back. 26 something now, IIRC
[G2 Android Development] meangreenie:
reading back the last 5 pages or so, i keep seeing mentions of a megalock.dll being needed

the file isn't in the download and i checked if it was in the thread with search

can anyone enlighten me?
[G2 Android Development] Fauert:
You do NOT need DLL. file, just KDZ....
[G2 Android Development] alsiladka:
What combination to use for D802T?

I have tried a variety of combinations to try and recovery my bricked D802T, so I don't even remember if I have missed any combination.

Is there anyway this works for the D802T?
[G2 Android Development] robalm:
Thanks for a good tool, i flashed v10L on my G3 d855 (CSE flash).

One problem is that the sdcard is "clean" no preloaded apps/video/image etc, i checked device/data and there is no preload folder :confused:

Is there a way to restore?
[G2 Android Development] alejflores94:
Hello everybody! I got my L5 II hard bricked last night, so I tried to repair it with this tool. I properly flashed the kdz file but after that the phone wont boot and there is no download mode. I still can connect it to the pc and it will be connected for just about 10 seconds, after that it will automatically get disconnected.

This what I get when reading phone information:

IMEI Empty.

IMEI Auth fail....Please check IMEI value

Phone Mode :Normal

Phone Model :

Server Model :

Buyer :

Phone Version :

Server version :

**Phone sub version lenght is more than 2 digit

**Server version is empty

please check IMEI or S/W file status in CSMG

There is anything I can do to repair the phone? I would really appreciate your help! Thank you!
[G2 Android Development] lambo98:
how to fix it?

help me please :crying:
[G2 Android Development] samuele94:
Install lg driver after connecting lg g2
[G2 Android Development] lambo98:
can not also
[G2 Android Development] samuele94:
see if it is properly recognized by pc,I had the same problem with win 8.1 but I solved it by reinstalling the driver. If before you had a g3 rom install from recovery a rom based on stock or if you have the D802 download the flashable stock rom
[G2 Android Development] zxandrewxz:
This has happened recently, Lg tools is not working for me. Phone connects to my laptop just fine and everything, yet when i run the tools it runs like normal except nothing changes on my phone. Was working perfectly fine, now it does't. Nothing has changed on my laptop, so I have no clue whats causing it not to work anymore
[G2 Android Development] psychyze:
I just recently flashed KDz but my phone wont boot. What happened?

UPDATED

to solve this you have to factory reset the fone if you experience boot stock image. turn off the fone and reset via volume down + power button, and next boot it will boot successfully.

i just done this and it worked. good thing i know how to troubleshoot very much.

hope this will help your problem.
[G2 Android Development] mor_1228:
anyone faced hardware failure. i cant turn on my wifi its stuck on turning on. i have tried everything JB KITKAT custom roms different basebands nothing working for me. 1 strange thing i noticed is when i downgrade to jb i get unrooted status in download mode but when i flash kitkat kdz file i get rooted in download mode without even rooting. any help as i need to go to service center.
[G2 Android Development] shanta:
After about 25% I get this! What does it mean?
[G2 Android Development] tidu12:
I get an error after it starts to update and reaches at 2%. PLS HELP!!!

(It reaches at the step of uploading/install the firmware, the stage after downloading)
[G2 Android Development] ohad129:
Is there a problem with this app to works on windows 8.1?
[G2 Android Development] reeper250:
Won't open in Windows 8.1 even when run in Windows 7 compatibility mode as well as running as admin...
[G2 Android Development] Cienight:
It runs perfectly on win 8.1
[G2 Android Development] reeper250:
It has decided to open now, not sure why

Tried to flash the new KDZ with the LG Flash Tool 2014 but when I pressed "read phone information" the program stops responding... At the moment I have the phone in download mode and trying to use LG Mobile Support Tool to download the new software onto it.
[G2 Android Development] :
Hi guys, I'm trying to flash a stock european rom, to remove my annoying carrier's ads. My phone is not rooted, the bootloader is locked and it's with the stock brazilian rom. Since I have a Mac, I've installed a virtual server machine to use Windows 7 (Parallels Desktop). I've already installed the latest LG drivers and downloaded the latest LG Flash Tool 2014, but I keep getting this error. I've already tried removing the battery, but I'm still stuck at this. I don't know what else to do :(﻿.

The error is ocourrs at about 2-5% of the process. The flash doesn't even starts on the phone screen. Also, I've read a lot of people said they installed it successfully. Another thing, is it correct to the LG G3 (portable device) (not the LGE Mobile USB Composite Device, not the LGE Mobile USB Modem, not the LGE Mobile USB Serial Port) to show "The device cannot start (Code 10)", while in download mode,when I go to Devices and Printer -> Right click on G3 -> Properties -> Hardware -> G3 (portable device)?﻿

Thanks
[G2 Android Development] papathvas:
I did the flash tools procedure and a couple of factory reset after that (D802), but i'm still rooted in download mode and the "LG RCT Check" is disabled

should i click the "clear phone software update registry" ??
[G2 Android Development] kreep22:
I tried to do this but keep getting this error and this is what I have. Any help will be appreciated thanks in advance
[G2 Android Development] Alex_XV6700:
[MENTION=612152]kreep22[/MENTION] just disconnect the phone and pull the battery and enter download mode again. make sure you are using com port 41 on device manager. [MENTION=225651]op[/MENTION] did your KDZ files get deleted after flashing? Mine just disappeared after I flashed my OG PRO E980... selecting any of the methods deletes the files
[G2 Android Development] AKDMA:
I'm having the same issue, I've tried around a dozen times, using every USB port.
[G2 Android Development] ohad129:
Try to take out the battery from flex [emoji3]
[G2 Android Development] AKDMA:
I've pulled the battery and retried multiple times, no go - how do I set the com41 ?
[G2 Android Development] wajahebat:
I have tried almost all, i mean all recommended, and suggested ways of using this tutorial, i still end up at 2% screen and that is all i got. Even tried as many types of drivers i can get my hands on, still stuck at 2%, even changed to COM41 port, still 2%.

Can someone suggest me any possible way to save my G2 ?? It just stuck at LG Logo, but still can enter TWRP but i cannot get sideload to work to push files. So i dont have any idea anymore.
[G2 Android Development] NightOrchid:
Thanks for this great guide.. Installed no problems... to help those asking..

Most important rule in flashing a rom, have patience and always read the instructions from beginning to end before you start..

This is a KDZ stock rom with stock recovery flash.. Like all ROM flashing.. the OP assumes youve got some knowledge, if you dont RESEARCH, READ and Read again..

This is an A, B, C.. guide.... to set up.. Before OP...

if you have any drivers or LG software installed.. remove it all now from PC and registry, reboot your computer.. and do this fresh...

1) Plug your phone into your PC, select slow charge mode and let WIndows install the relevant drivers

2) unplug then repolug your phone in again, this time select MTP from USB list and let those drivers install.. if you get "Failed" dont worry..

3) Goto Settings > General > About Phone > software information over and over until it says "your now a developer".. open developer optons > check usb debugging.. and plug phone in again.. letting the drivers install, if any fail dont worry.

4) now Install LG USB Drivers

5) follow steps 1 & 2 again.. to install any drivers that "failed"

NOW...

Turn of your phone.. wait 10 secs, then hold Vol UP as you plug in the USB cable.. this activates DownLoad Mode...

Now you may see a new installing driver window pop up and the phone enter "Firmware update mode... If you see this.. DO NOT TOUCH your phone.. allow these drivers to be Installed on your PC.. they can take as long as 15 mins, but the phone screen will show 0%.. just leave it alone, let these drivers install.

Once the Drivers have installed, close the driver window on your PC... COM4 will say Fail on your PC.. this is ok.

Now, leave the phone alone in firmware update mode, do not touch it, unplug it or stop it,

Now goto the first post here and follow the steps thats laid out for you.. COM4 will show on your phone instelf..

On the install.. the Flsah tool will show alot of ?????, just ignore them.. Leave the phone and you PC alone and let it install... it takes a while.

Once the phone restarts, wait until the home screen appears, then you can unplug it.

Hope that helps
[G2 Android Development] Alex_XV6700:
[MENTION=5090984]wajahebat[/MENTION] have you seen if your G2 in download mode is displaying another model for example mine is a LS980, but once it displayed D802 and didnt let me flash with the old LG Flash tool bcs it said that I was flashing a wrong tot file. If you keep having problems it must be the operating system that has to have some damage. try to use a fresh install of windows or another pc/laptop. Im using Win8.1 previous was win7x64 and had no problem at all using any of these Flash tool versions.
[G2 Android Development] wajahebat:
So i drop this guide for temporary, instead i use second option to try this Guide right here to flash back to JB, and it proves a success, my phone successfully with JB.

But then i cant stand the JB lagginess and its animation, so i give this tutorial a second chance. I install the driver, plug in my phone in Download Mode, and proceed to the Flashtool 2014. And guess what? The same error pop out again, at first it stuck at Connection to Server Failed, but i proceed with Retry button and it stuck at 2%, and thats it, but at this stage, i noticed at my phone screen its already moved by 2%, and this is different case than before. So i Re-do back the steps, until it stuck at Connection to Server Failed, i noticed the percentage at my phone moved to 4%, but my hands are itchy at that time and i clicked Retry accidentally and the progress hit 2% on flashtool and failed. So i think, why not just let the screen(on pc) at the Connection to Server Failed stage and see what the phone does. And i did just that, let the pc stuck at Connection to server failed without clicking Retry, and my phone proceed until 100% and boots up with V20G !!! After my phone hit 100%, the flashtool Force close but fcuk yeah i dont care as long as my phone booted up already.

So my guess is, it is not the Driver or the PC that got this problem, its the Tool itself, maybe its not consistent across platform with different types of drivers and hardwares heck yeah, who knows? If someone who failed to use this tool might try like what i did. I can write proper steps if you guys want. And thanks to the developer of this tool. I know it can be improved more

:good::D:)
[G2 Android Development] marko1103:
I`ve got the same error now... Always stucks at 2% but if I look at the phone I can see that flash process didn`t start at all.

I used this program many times and no problem at all but after I did the official update to V20G this is the error I got.

Tried flashing V20F and V20G but none of them worked. V20F I flashed before so I know that it should work but obviously after V20G update LG did something which broke this program so apperently there are bugs now or I am missing something which I`m sure I don`t...
[G2 Android Development] Hydro333D:
stuck into fastboot mode

What shall i do i f i am stuck into fastboot mode .there is no download mode or system booting to go in .D802 here international was kitkat stock 2days brand new and after rooting success and tryed to flash recovery using autorec rebooted and stuck into fastboot .Can i use this tool gyes and what proccedure shall i follow via fastboot only I have downloaded the firmware europe 802220b but tot file witch shall i choose dont know a glue ..need instructions here thanks all of you ..
[G2 Android Development] reeper250:
You should always be able to get into download mode? Try a different usb port on your pc. Hold the volume up key for around ten seconds then while holding it down plug it into the pc with the LG updater software ready to go with the kdz downloaded. Fixed mine when I had a similar problem, although I didn't even have fastboot. Good luck
[G2 Android Development] vladmir:
Hi ppl!

In this version only shows normal way to flash, the option to flash with wipe don't show up!

I'm using win 8.1 64x and already install the additional software that OP indicate.

Any tip to resolve this issue?

Send from D802 32gb OptimusG3 v1.4.1+Dominax Kernel v8.7
[G2 Android Development] Gravediggaz:
I keep getting this error

Please disconnect the cable from your cell phone in order and remove and connect the battery.

Power on your cell phone and press the Restart button to resume update.

If LG Support Tool is stopped abnormally,try with [Options]-[Upgrade Recovery] in tool menu.

anyone know how I fix this?
[G2 Android Development] ohad129:
Additional way ?for 8.1?
[G2 Android Development] vladmir:
Even with the installation of the additional c++ runtime!

Send from D802 32gb OptimusG3 v1.4.1+Dominax Kernel v8.7
[G2 Android Development] ohad129:
My problem its what ever im doing no download mode for me

Should i remove twrp ? To recover it!!!!

Please send me the link for the extra c++
[G2 Android Development] vladmir:
You have the link in the first post.

Send from D802 32gb OptimusG3 v1.4.1+Dominax Kernel v8.7