Database Users

[Q] Flash stock with security error

Ok, so I flashed cleanrom ex, and on reboot I got a security error.
I tried to get to recovery, but it wipes data and immediately reboots.
I've tried flashing the stock rom, but lg flash tool tells me it's the wrong device (now thinks it's a D802).
I've been trying to get into TWRP on scrosler and samsunggalaxystig's advice, first by repeatedly trying an adb reboot recovery, then by writing a batch script to do it repeatedly in order to catch it before it reboots.
Problem is, I don't know if I had already had ADB drivers installed on this computer for the G2 (had rooted while at work), and despite installing them more than once, I don't think the device actually has enough time to be recognized as I still have an unrecognized "g2" in device manager while TWRP is wiping.
Any ideas? Is there any way I can force the install of the ADB driver without having it connected for more than 20 seconds? Spitballing... would it be possible to actually flash a D802 image so I could then root, change the build.prop to D800, and then flash the D800 image?
Totally at a loss at this point.

did you solve your problem? i have a similar problem and i just bricked an s3. this g2 is brand new and now it's bricked too! if you have found a solution please respond... :crying:

kureta said:
did you solve your problem? i have a similar problem and i just bricked an s3. this g2 is brand new and now it's bricked too! if you have found a solution please respond... :crying:
Click to expand...
Click to collapse
No problem if you brick a sammy phone. its easy to flash stock rom. How did you brick your g2?
---------- Post added at 08:13 PM ---------- Previous post was at 08:11 PM ----------
lastdeadmouse said:
Ok, so I flashed cleanrom ex, and on reboot I got a security error.
I tried to get to recovery, but it wipes data and immediately reboots.
I've tried flashing the stock rom, but lg flash tool tells me it's the wrong device (now thinks it's a D802).
Totally at a loss at this point.
Click to expand...
Click to collapse
Why did flashing a rom leads you to that error? Sorry but not familiar with your roms but is this rom really for your LG G2 model?

lastdeadmouse said:
Ok, so I flashed cleanrom ex, and on reboot I got a security error.
I tried to get to recovery, but it wipes data and immediately reboots.
I've tried flashing the stock rom, but lg flash tool tells me it's the wrong device (now thinks it's a D802).
I've been trying to get into TWRP on scrosler and samsunggalaxystig's advice, first by repeatedly trying an adb reboot recovery, then by writing a batch script to do it repeatedly in order to catch it before it reboots.
Problem is, I don't know if I had already had ADB drivers installed on this computer for the G2 (had rooted while at work), and despite installing them more than once, I don't think the device actually has enough time to be recognized as I still have an unrecognized "g2" in device manager while TWRP is wiping.
Any ideas? Is there any way I can force the install of the ADB driver without having it connected for more than 20 seconds? Spitballing... would it be possible to actually flash a D802 image so I could then root, change the build.prop to D800, and then flash the D800 image?
Totally at a loss at this point.
Click to expand...
Click to collapse
Hey I'm in the exact same position as you... did you manage to figure out a way to get into recovery?

kureta said:
did you solve your problem? i have a similar problem and i just bricked an s3. this g2 is brand new and now it's bricked too! if you have found a solution please respond... :crying:
Click to expand...
Click to collapse
twrp corrupted my cache partition and the phone could not boot. i tried to flash cwm while in twrp and i guess i messed up recovery and/or boot partitions. al i could get was fastboot. i flashed a boot.img i got from somewhere in here. now it says security error and it does not boot. it does not enter into fasboot. i can enter into recovery mode but it is the stock lg recovery and if i choose "delete all data", which is the only option, it gives an error and restarts.
if i try to flash stock firmware as described in this post it stops at 49%.

kureta said:
twrp corrupted my cache partition and the phone could not boot. i tried to flash cwm while in twrp and i guess i messed up recovery and/or boot partitions. al i could get was fastboot. i flashed a boot.img i got from somewhere in here. now it says security error and it does not boot. it does not enter into fasboot. i can enter into recovery mode but it is the stock lg recovery and if i choose "delete all data", which is the only option, it gives an error and restarts.
if i try to flash stock firmware as described in this post it stops at 49%.
Click to expand...
Click to collapse
I am on the same boat, same problem, and don't know what else to do...hope someone could help us out.

Yep me to same issue. Pretty much tried 6 different methods and still stuck

Solution
IF you still have guys this issue i have solusion for you .
This happened to me yesterday too
1. Download ADB drivers for LG G2 LINK
2. Download LG Mobile Support Tool you can find this here LINK
3. HOLD VOLUMEUP + POWER button to enter the download mode and connect your device to pc
4. Run LG Mobile Support Tool ( if your device vas found click settings select upgrade firmware this will download for you 1.9 GB STOCK FIRMWARE
5. Enjoy your mobile

Any luck anyone? I can't get the suggestion in the last post to work because my phone just goes from the LG Logo to Security Error. I can't get to download mode. Or recovery. Or get ABD to see it.

Odd
quatrix1 said:
IF you still have guys this issue i have solusion for you .
This happened to me yesterday too
1. Download ADB drivers for LG G2 LINK
2. Download LG Mobile Support Tool you can find this here LINK
3. HOLD VOLUMEUP + POWER button to enter the download mode and connect your device to pc
4. Run LG Mobile Support Tool ( if your device vas found click settings select upgrade firmware this will download for you 1.9 GB STOCK FIRMWARE
5. Enjoy your mobile
Click to expand...
Click to collapse
i have to choose upgrade recovery and it gets past analyzing then doesnt show a bar for downloading software...

HELP!!!!!!!!!!!!!!!!!!!!!
Can someone help me I successful in installing twrp though autorec apk and the same for rooting my g2. I flashed cm with nightlies and noticed that twrp had a update. I downloaded the zip and try flashing it like flash a recovery in flashify but that din't work and readed that zip flashing though twrp didn't work but renumber this video and though it would update my recovery to 2.7.1 but it was successful in doing so but when I got to recovery it was 2.7.0. That not the problem form there I tried to boot into my system. Then it turn off though that I passed power off instead but when turn my g2 back on I found that I had a security error show up then turn back off. So can someone help show me a tutorial on unbick or a way to remove error. Also I have the d800 and i have some idea without going though unbicking a hard factory rest or flasing twrp form there site in fastboot. Finally that lg mobile support tool say that im up to date. I think doing the autorec twrp recovery locked as my phones recovery like trying to flash a rom with a locked bootloader.

Ok guys i trying to help cause it happen to me too,sorry for my english too slow but i try,when you try go twrp with volume up+power buttom it still show security errow,that ok your device not hardbrick yet,when you try volume down+power buttom it show hard reset it does mean it clear all rom,picture in internal but it go to twrp again,and them just flash another rom in your device and it done,have great day piece

I had the same problem on my G2 was using twrp to flash cyanogenmod not sure what i did and phone rebooted to show security error message. I entered recovery mode (power and volume down release when logo pops up and press power and volume down again hold for a second then tap both buttons a few times) pulled up the option to factory reset so i did and it booted me into twrp and allowed me to flash cyanogenmod correctly this time and the phone started back up with no problems. hope this can help someone else as well.

Anybody know the solution?
I also have the security error boot loop after flashing KK baseband files... I tried to enter recovery mode by holding vol down & power button but it wont work...
it does work when i enter download mode (vol up + power button), but i don't want to have to download the stock LG ROM..
anybody know how to by pass the security error boot loop to allow me to reflash?

kureta said:
did you solve your problem? i have a similar problem and i just bricked an s3. this g2 is brand new and now it's bricked too! if you have found a solution please respond... :crying:
Click to expand...
Click to collapse
if you still bricked. try this
get your tools from here: http://forum.xda-developers.com/showthread.php?t=2432476
keep reading or follow above thread. both will work.
best of luck.
After all the drivers installed correctly
make sure your phone is connected to the
com41 port change it if it already not ( Under device manager > Go to Ports (COM & LPT). You should see LGE AndroidNet etc... Right click it and go to Properties > Port Settings > Advanced > Change COM Port Number to COM41 > OK > OK > Close Device Manager )
run flash tool
1. choose type CDMA
2. chose PhoneMode: DIAG
leave rest as it is.
3. choose your kdz file.
then go to download mode
1. power off
2. press and hold vol + key and plug usb cable
3. done )
We have go 2 flashing modes.
1. Normal Flash is for flash with keeping data
2. CSE flash is totally new start preffered.
hope this helps.

thanks but it was a long time ago and I further messed up things, ended up sending it for warranty. they have replaced the device.

me too messed up my cell 1st i was on cloudy g2 v2.1 installed cm11 nightlies but the camera was not so good so then installed cloudy g2 v2.1 n since then i was having problem regarding sound during call and also some hard noise like siren starts randomly, i searched alot but didnt got any solution. wiped all many times (including internal storage ). but no luck then i thought i might be baseband error so i just downloaded auto recovery n flashed it n then stuck into security error but thank GOD i had custom rom in my sd card that time i flashed it back but still em having the sound error.

lastdeadmouse said:
Ok, so I flashed cleanrom ex, and on reboot I got a security error.
I tried to get to recovery, but it wipes data and immediately reboots.
I've tried flashing the stock rom, but lg flash tool tells me it's the wrong device (now thinks it's a D802).
I've been trying to get into TWRP on scrosler and samsunggalaxystig's advice, first by repeatedly trying an adb reboot recovery, then by writing a batch script to do it repeatedly in order to catch it before it reboots.
Problem is, I don't know if I had already had ADB drivers installed on this computer for the G2 (had rooted while at work), and despite installing them more than once, I don't think the device actually has enough time to be recognized as I still have an unrecognized "g2" in device manager while TWRP is wiping.
Any ideas? Is there any way I can force the install of the ADB driver without having it connected for more than 20 seconds? Spitballing... would it be possible to actually flash a D802 image so I could then root, change the build.prop to D800, and then flash the D800 image?
Totally at a loss at this point.
Click to expand...
Click to collapse
kureta said:
did you solve your problem? i have a similar problem and i just bricked an s3. this g2 is brand new and now it's bricked too! if you have found a solution please respond... :crying:
Click to expand...
Click to collapse
k2thejx5 said:
Yep me to same issue. Pretty much tried 6 different methods and still stuck
Click to expand...
Click to collapse
Hey guys, I was in the same boat for a little but was able to fix it by downloading the 801C firmware and flashing it. The firmware file should be a KDZ extension and you should also download LG Flash Tool 2014. Turn the phone on by holding the Power button and Volum up while it is plugged into your computer(It has to be plugged into a computer with LG phone drivers or it won't work).
Follow this tutorial and you will be set.
http://www.droidviews.com/how-to-restore-lg-g2-to-stock-firmware/
Start at step 17 on Method 1 and you should be golden.
Hope this helps guys!

LG G2 F320L stuck in Boot Loop not going in download mode

hi guys,
i flashed recovery using the manual method from this thread http://forum.xda-developers.com/showthread.php?t=2468858.
I wasn't able to use the last command
Code:
rm /sdcard/g2_security
I thought it didn't work , i also updated the my phone software.
When my phone restarted it went to cwm and now its stuck there.
Now when I try to boot I can either get in CWM or some Korean Recovery Menu with three option (i tried all nothing happend) or just stuck in boot loop!
I can't get in download mode by pressing vol up and plugging usb cable (tried all possible methods)
I will be glad if someone can help me out.
Thanks in advance

That's an unexpected situation to say the least.
So in short: installation of recovery worked, but you lost access to your ROM.
Correct?
Now, if you had a flashable ROM on your sd card you would be sorted, no?
I would say, get any compatible ROM, put them on a micro sd card and plug them into your phone. Flash through cwm...
Am I misunderstanding?
Otherwise there is always the fully back to stock option:
http://forum.xda-developers.com/showthread.php?t=2475045

Zentac said:
That's an unexpected situation to say the least.
So in short: installation of recovery worked, but you lost access to your ROM.
Correct?
Now, if you had a flashable ROM on your sd card you would be sorted, no?
I would say, get any compatible ROM, put them on a micro sd card and plug them into your phone. Flash through cwm...
Am I misunderstanding?
Otherwise there is always the fully back to stock option:
http://forum.xda-developers.com/showthread.php?t=2475045
Click to expand...
Click to collapse
I was able to fix my phone using this thread. I was able to get in recovery but not in download mode. After executing these commands I flashed stock firmware through LG flashing tools.

aatish said:
hi guys,
i flashed recovery using the manual method from this thread http://forum.xda-developers.com/showthread.php?t=2468858.
I wasn't able to use the last command
Code:
rm /sdcard/g2_security
I thought it didn't work , i also updated the my phone software.
When my phone restarted it went to cwm and now its stuck there.
Now when I try to boot I can either get in CWM or some Korean Recovery Menu with three option (i tried all nothing happend) or just stuck in boot loop!
I can't get in download mode by pressing vol up and plugging usb cable (tried all possible methods)
I will be glad if someone can help me out.
Thanks in advance
Click to expand...
Click to collapse
The same exact thing happed to me. did u fix it, if yes can you please tell me how??

I have the same issue. Nothing mentioned in other threads is useful just because I CAN'T ENTER DOWNLOAD MODE. Totally stuck Help! Devs! Anyone!

Try installing some custom rom from recovery...after installing custom rom you can enter into download mode and do whatever u want...return to stock using kdz files or anything else..

Oh ****! Now I have screwed up! Wiped out my system

Hi.
I was trying to root my P8 and followed a guide to install twrp recovery and other stuff. I installed the wrong version of what I think was SuperSu and after that I got stuck at the logo when I started the phone. I went into twrp recovery mode and tried a few things there, which didn't work. Then I wiped out the system. That was dumb as ****. Now I can't do anything. When I start the phone, I only see the Huawei logo and "powered by android" at the bottom. I've been googling a little but can't find a solution.
Is there any way to fix this or am I screwed? I can't buy a new phone at the moment. :/

NedNegel said:
Hi.
I was trying to root my P8 and followed a guide to install twrp recovery and other stuff. I installed the wrong version of what I think was SuperSu and after that I got stuck at the logo when I started the phone. I went into twrp recovery mode and tried a few things there, which didn't work. Then I wiped out the system. That was dumb as ****. Now I can't do anything. When I start the phone, I only see the Huawei logo and "powered by android" at the bottom. I've been googling a little but can't find a solution.
Is there any way to fix this or am I screwed? I can't buy a new phone at the moment. :/
Click to expand...
Click to collapse
Install stock recovery with fastboot and then reinstall your firmware using the dload method.

How do I do that when nothing works?

Did you install twrp
Sent from my GRACE using Tapatalk

I did, but it seems I can't go into twrp mode anymore. I restarted my phone after I was stupid enough to wipe the system. I just got to the Huawei eRecovery EMUI thing, but when i try to download new version and recovery it fails to get package info from network.

NedNegel said:
I did, but it seems I can't go into twrp mode anymore. I restarted my phone after I was stupid enough to wipe the system. I just got to the Huawei eRecovery EMUI thing, but when i try to download new version and recovery it fails to get package info from network.
Click to expand...
Click to collapse
Enter bootloader mode (power + volume down)
Connect to pc
Use adb/fastboot (follow one of the thousands guides on Internet) and flash the twrp recovery.
Then with adb copy a rom into the phone and flash it via twrp

wfonz said:
Enter bootloader mode (power + volume down)
Connect to pc
Use adb/fastboot (follow one of the thousands guides on Internet) and flash the twrp recovery.
Then with adb copy a rom into the phone and flash it via twrp
Click to expand...
Click to collapse
I finally made it.
Most of those thousands of guides I found just said about the same thing as erayrafet: "Install stock recovery with fastboot and then reinstall your firmware using the dload method."
I tried that, I pressed power + volume down and all the other things people said, but nothing happened. . It did not work, and could not reach bootloader mode. Have been trying to make it work since yesterday, and now I finally succeeded. I sat for about 15 minutes and just pressed power + volume down. The phone just restarted over and over, somtimes I got to the Huawei eRecovery EMUI thing, but after about 15 minutes I finally got into bootloader mode.
So it's solved now after I found another guide.
Thanks for trying to help. :good:

Moto G4 recovery boot loop

I really need help here. New to rooting androids, will pay BTC for whoever can help me.
I started off fine, unlocked my bootloader, flashed to TWRP and installed supersu. * I WAS ABLE TO BOOT INTO SYSTEM HERE *
I then tried to flash some other stuff and got stuck where it would only boot to TWRP.
Downloaded the stock firmware to flash it (XT1625) and ran all the commands.
Still everytime I reboot it goes into recovery mode.
Any help?

I have tried to do factory reset directly from phone menu. This got me into TWRP. I have selected factory reset again.
Then I was able to boot only to TWRP, not system.
I have fixed it by booting into booloader (power + vol downs) and to select START. Then it started to system OK.
Not sure if this is your case.
okplshelpthanks said:
I really need help here. New to rooting androids, will pay BTC for whoever can help me.
I started off fine, unlocked my bootloader, flashed to TWRP and installed supersu. * I WAS ABLE TO BOOT INTO SYSTEM HERE *
I then tried to flash some other stuff and got stuck where it would only boot to TWRP.
Downloaded the stock firmware to flash it (XT1625) and ran all the commands.
Still everytime I reboot it goes into recovery mode.
Any help?
Click to expand...
Click to collapse

^this works !

novakmi said:
I have tried to do factory reset directly from phone menu. This got me into TWRP. I have selected factory reset again.
Then I was able to boot only to TWRP, not system.
I have fixed it by booting into booloader (power + vol downs) and to select START. Then it started to system OK.
Not sure if this is your case.
Click to expand...
Click to collapse
Thank you very much for your tutorial which helped a lot.
What did you do to keep it from booting into recovery upon the next reboot? Mine goes into recovery-loop again once I do regular reboot from the system. There might be a software switch somewhere.
Thanks alot

KlausR said:
Thank you very much for your tutorial which helped a lot.
What did you do to keep it from booting into recovery upon the next reboot? Mine goes into recovery-loop again once I do regular reboot from the system. There might be a software switch somewhere.
Thanks alot
Click to expand...
Click to collapse
Hello, I didn't observe such issue. Reboots from system are ok for me.

Download the correct firmware for your phone, if it is AMZ variant then download AMZ firmware.

Lg v20 stuck into bootloop no download mode only recovery | please help

HI I PUT MY PHONE ON CHARGE SO IT SHOWED THAT I AM USING AN HANDSFREE SO I RESTARTED MY PHONE BUT NEVER TURNED ON AGAIN ITS STUCK INTO A BOOTLOOP
IF I TRY TO GET INTO DOWNLOAD MODE IT SHOWS DOWNLOAD MODE FOR 5 SECS THEN RESTARTS AGAIN
IT DOEST NOT BOOT INTO FASTBOOT ALSO AND MY PHONE WAS ON OFFICIAL STOCK ITS AN F800L MODEL ON OREO 8.0.1
I CAN ONLY GET INTO FACTORY MODE BUT IF I RESET MY PHONE IT STUCKS ON BOOTLOOP AGAIN, PLEASE HELP ME...
ANYONE??? PLEASEEEEEE :crying::crying::crying::crying::crying::crying::crying::crying::crying::crying:

hamzarawal said:
HI I PUT MY PHONE ON CHARGE SO IT SHOWED THAT I AM USING AN HANDSFREE SO I RESTARTED MY PHONE BUT NEVER TURNED ON AGAIN ITS STUCK INTO A BOOTLOOP
IF I TRY TO GET INTO DOWNLOAD MODE IT SHOWS DOWNLOAD MODE FOR 5 SECS THEN RESTARTS AGAIN
IT DOEST NOT BOOT INTO FASTBOOT ALSO AND MY PHONE WAS ON OFFICIAL STOCK ITS AN F800L MODEL ON OREO 8.0.1
I CAN ONLY GET INTO FACTORY MODE BUT IF I RESET MY PHONE IT STUCKS ON BOOTLOOP AGAIN, PLEASE HELP ME...
ANYONE??? PLEASEEEEEE :crying::crying::crying::crying::crying::crying::crying::crying::crying::crying:
Click to expand...
Click to collapse
I'm sorry for your loss. To me it sounds like something may be physically damaged.

To elaborate a bit further, fastboot doesn't usefully exist without root, stock recovery can only wipe your userdata, and you've already said download mode reboots way too early to try anything. There is no safe way to try anything with the firmware, if it even somehow is a firmware issue. There's the leaked firehose, if you force it into 9008 mode, but that's risky and I have no personal experience with it to give more details.
Basically don't expect it to be coming back.

Phoenix591 said:
To elaborate a bit further, fastboot doesn't usefully exist without root, stock recovery can only wipe your userdata, and you've already said download mode reboots way too early to try anything. There is no safe way to try anything with the firmware, if it even somehow is a firmware issue. There's the leaked firehose, if you force it into 9008 mode, but that's risky and I have no personal experience with it to give more details.
Basically don't expect it to be coming back.
Click to expand...
Click to collapse
SO THAT MEANS IM NEVER BUYING AN LG AGAIN:crying:

boot in fastboot flash twrp and reinstall laf partition

Lussardi said:
boot in fastboot flash twrp and reinstall laf partition
Click to expand...
Click to collapse
Without it already being rooted and the dirtysanta bootloader installed there is no fastboot mode on anything (which you would have seen if you had read the OP) but the h918 (which still can't flash with it) and us996, and you still need a working phone to actually set the options in Android to allow unlocking the bootloader.
And I'd put it at like an 80% chance it's hardware failure anyway, since it's boot looping in download mode too.

Try holding down volume down and plugging in USB.......

Same issue herewith...
LG V20 boot loop , restarting again and again , also when USB cable method is applied to enter into the Download Mode , it also restarts after sometime after showing download mode icon etc........