Fixing LG G Stylo LS770 Security Error, Authentication Fail #9 - LG G Stylo Guides, News, & Discussion

Hi guys, I really need help in fixing my phone. I rooted my Stylo on 5.1.1 using the oneclickroot and all was well for many days. I was able to reboot the phone multiple times on multiple days. Today, however, I turned off the phone and tried to reboot. The LG logo appeared followed by the LG logo and "Security Error [Authentication Fail #9]". My research indicated that this is likely to be a soft brick which is potentially fixable. I read the threads "Official Boost LG G Stylo Unbrick Guide ZV4" and "Official Boost LG G Stylo Unbrick Guide ZV5" and am unsure about how to proceed. I do not know if my phone was on ZV4 or ZV5, hence I am not sure which guide to follow. Also, I deleted many of the stock bloatware apps but none that would prevent rebooting, I think.
Any help would be appreciated!

Bump ba bump. There's gotta be someone here who know the answer to this...I hope.

Iv got the exact same problem. Same cricket g stylo phone. I must have removed an an appi needed when i was removing bloatware. Rooted with kingroot and everything was fine until i went to reboot. Im hoping i can download the stock from lg. Any help would be much neded and appreciated

I'm on the LS770 too and I've gotten that error. You just need to put it into download mode (hold Volume Up + Power while plugging in USB cable) and reflash the system image, either the stock or the rooted one using the guides 6th_Hokage has posted.
ZV4 is Lollipop 5.0 and ZV5 is Lollipop 5.1.1 I believe. My phone came with ZV4 preloaded and I upgraded it to ZV5 over the air and flashed the rooted ZV5 image later on.
Beware, I'm pretty sure messing with system applications is what gave me the Authentication Fail #9 error in the first place. For whatever reason it does not like certain apps in /system/app to be to messed with or removed. I bricked my phone a few times trying to free up space on /system using Titanium Pro. Here soon I'm gonna try with Link2SD Pro and see if that works or if it's just hopeless to try to mess with /system
Sent from my LGLS770 using Tapatalk
---------- Post added at 15:36 ---------- Previous post was at 15:35 ----------
I would recommend flashing the already rooted image with the toolkit provided in his guide instead of rooting it yourself. Also there is no stock firmware available from LG that I know of, the only place I know to get it is here on XDA from people who have extracted it.
Sent from my LGLS770 using Tapatalk

does hard reset works
Robbieisbobert said:
Hi guys, I really need help in fixing my phone. I rooted my Stylo on 5.1.1 using the oneclickroot and all was well for many days. I was able to reboot the phone multiple times on multiple days. Today, however, I turned off the phone and tried to reboot. The LG logo appeared followed by the LG logo and "Security Error [Authentication Fail #9]". My research indicated that this is likely to be a soft brick which is potentially fixable. I read the threads "Official Boost LG G Stylo Unbrick Guide ZV4" and "Official Boost LG G Stylo Unbrick Guide ZV5" and am unsure about how to proceed. I do not know if my phone was on ZV4 or ZV5, hence I am not sure which guide to follow. Also, I deleted many of the stock bloatware apps but none that would prevent rebooting, I think.
Any help would be appreciated!
Click to expand...
Click to collapse
Does hard reset fix the issue?

Hello,
I have the same problem
can you help
I need TOT ROM if someone have.. please

allawy_y said:
Hello,
I have the same problem
can you help
I need TOT ROM if someone have.. please
Click to expand...
Click to collapse
If you email the OP in link below he'll have the tot, think he wants $10
http://forum.xda-developers.com/lg-g-stylo/help/lg-g-stylo-boost-zv7-booting-error-1003-t3365632

jmacie said:
If you email the OP in link below he'll have the tot, think he wants $10
http://forum.xda-developers.com/lg-g-stylo/help/lg-g-stylo-boost-zv7-booting-error-1003-t3365632
Click to expand...
Click to collapse
Hard reset didn't work. I'll try the link

Related

[HELP] Cant root my T-Mobile G2

Hello, I have the TMobile lg-g2 4.2.2 d80110c, I have tried my best and followed all of the guides I could in this forum and others, but never succeed in rooting my phone.
I have the stock rom and cant go into recovery, only hard reset, and when using ioroot my phone just restartes.
When using another root guide, the cmd window just closes after a few seconds, there was even one in which I got all the way to the end and installed superuser only to find out with rootchecker that I didn't actually succeed in the rooting proccess.
towelroot does not work either, neither does any guide i found on the internet.
I have also tried to soft reset the device and then try to root it but again I arrived at the same results.
Does anyone have any idea of why this isnt working for me? or what am missing?
thanks
(IORoot - http://forum.xda-developers.com/show....php?t=2448887
http://forum.xda-developers.com/show...&postcount=869)
Did you already unlock the boot loader?
No variant of the lg g2 has an unlockable bootloader all g2s are Loki patched very little difference but its not a good idea to confuse the two you can end up with a brick you should try reflashing the stock ROM maybe there is something weird going on
sent from my T-Mobile LG-VS980
Update ROM
I think towel root is not working for you because you are on 80110c. IOroot unfortunately does not work on the T Mobile D 801. Try updating to at least 80110g. You will need the AutoRec apk to install custom recovery http://www.droidviews.com/install-twrp-recovery-on-lg-g2-running-android-4-4-2-kitkat/
Hope this helps.

LG-STYLO H634 CRICKET Supersu/xposed framework installation guide

ok, so there are some things i've found out by doing some research and combining what i found on here with the issues that some people were having with the Cricket version of the LG Stylo, and would like to share with you guys. while i was rooting my phone with kingroot, i noticed a threat that discussed that using supersu me and supersu wasn't an option without soft bricking your phone with a boot loop, after some research and trial i figured out how to get around the problem. The issue was the uninstallation of kinguser app form the phone, this is because using supersu me uninstalls kingroot and replaced it with the superuser binaries, but it leaves some core files of kinguser behind which causes errors, an if you keep your phone on, you'll notice that you'll start getting error messages for an about kingroot permission and all types of errors until your phone starts to freeze and act up. there is an easy fix for it all that worked for me, and would like to share this information and help people having this issue.....
I'm posting this as a hint for those who needed the help with installing xposed on cricket model LG STYLO only running 5.1.1 ​
so to begin, download system repair 2016 and apps2sd from play store, kinguser directly from their site so it will be the latest version,,,root your phone,,,,,don't delete the kinguser apk you downloaded you'll need it for later,,,,now install supersu me from the play store and open and run it, it'll uninstall kinguser and replace the binaries for superuser, this is where its gonna become tricky,,,,,,download supersu and run which will ask for update of binaries also let it finish updating and uninstall the supersu me control,,,,,now open apps2sd and clear the davik cache and other caches without restarting,,,,then run system repair 2016, it'll show that you had a few errors because kinguser hates the fact that supersu me uninstalled it and left messed up configurations on your phone, then clear the davik cache again, now you have to use the same kinguser apk you get at the start of the process and reinstall it to your phone, or else you will be getting a boot loop issue......for some reason even though all the caches are cleared and the system has been checked for errors, the kinguser app installs itself as a system app, a dependency if you will, like a basic LG/Cricket app that if you uninstall will cause errors, so but reinstalling it we stop that problem, you can run it but don't need to activate the root option of kinguser......this will cause the kinguser permission errors to stop also from this point only you can restart your phone,,,,,now you're able to install flashfire and xposed frameworks, and even restart your phone without worry of boot looping since there isn't much support for the LG-H634 stylo model.........:angel::angel:
hope this was helpful for you guys that was in need of replacing kinguser, and installing xposed framework, i've not tried anything further with the twrp install but keep a look out for the names "vegito6" "vegito69" ....and wish me luck on twrp
#humbleprogrammer
seems i've got to post at least 10 times in order to post outside pics
So I rooted my same phone via kingroot and it has the purify apo along with it. Also having problems with errors and stuff. I'm gonna follow your method see what happens. This being #2 stylo after bricked the first one and couldn't find kdz. Anyway I'll get back to ya let me know if you have anymore info thanks for the help man.
orphan tear maker
Help Please
Drumdestroyed said:
So I rooted my same phone via kingroot and it has the purify apo along with it. Also having problems with errors and stuff. I'm gonna follow your method see what happens. This being #2 stylo after bricked the first one and couldn't find kdz. Anyway I'll get back to ya let me know if you have anymore info thanks for the help man.
orphan tear maker
Click to expand...
Click to collapse
got bricked today, anyone any luck with something??
markos638 said:
got bricked today, anyone any luck with something??
Click to expand...
Click to collapse
ok i'm not sure how you guys got bricked, but i just got bricked using flahfire to create backup, so don't use that app as of yet, but anyways working on the replacement now, gonna be trying to create a restore img or flashable zip for the cricket stylo.
vegito69 said:
ok i'm not sure how you guys got bricked, but i just got bricked using flahfire to create backup, so don't use that app as of yet, but anyways working on the replacement now, gonna be trying to create a restore img or flashable zip for the cricket stylo.
Click to expand...
Click to collapse
I got bricked, trying to change from kingroot to SU, I´ll really appreciate when you find solution give us instructions on how you did it!!
Have you guys any luck with a recovery method? And think you for helping I'll do my best with what I have. Also idk if I mentioned it earlier but when I reboot lg symbol appears but (authentication failed #9) appears below it. It was roted via king root and didn't o anything but remove some bloatware. Idk God be with you man cuz this is a bummer
vegito69 said:
ok i'm not sure how you guys got bricked, but i just got bricked using flahfire to create backup, so don't use that app as of yet, but anyways working on the replacement now, gonna be trying to create a restore img or flashable zip for the cricket stylo.
Click to expand...
Click to collapse
I'm pretty sure that you ended up with brick because you didn't unlock your bootloader before backing up. My girlfriend did the same thing. As of right now I'm trying to figure out If there's a way past the bootloader or at least a way to do everything the bootloader can do without unlocking it.
Original Firmware
Can we not flash the original firmware via download mode ? I had this phone (bought from a friend, cricket sim unlocked, phone bricked while i was playing around. )
I'm not super familiar with LG phones, but i keep hearing about a KDZ , is that some kind of official image format ?
If we can flash it for stock via download mode, can someone direct me as to where I might find instructions for our variant of the device, please ?
I was able to replace Kingroot with SuperSu using a guide I found on a website called w0lfdroid, I think. I just Google 'replace Kingroot with SuperSu and it was the second one down (I'm a new user so I can't post the link). I think it worked pretty well, but I'm still not able to flash TWRP or start the process to get xposed. If I can't get it, I might unroot and try the process again with this method.
as anyone with brick try this http://lg-firmware-rom.com/downloads/lg-g-stylo-h634-stock-tot-firmware-v10g/ , they offer files for unbricking, $40 bucks
what do you guys think
markos638 said:
as anyone with brick try this http://lg-firmware-rom.com/downloads/lg-g-stylo-h634-stock-tot-firmware-v10g/ , they offer files for unbricking, $40 bucks
what do you guys think
Click to expand...
Click to collapse
works great, after flashing with LG Flash tools tot method just take out battery and wait 5sec, and put it back in and turn on, android logo will show and then it will boot normally, now i'm back to working on the supersu install methods to help people from bricking, wish me luck . also backing up boot img and then trying to use super sume to switch to still will cause boot looping to my knowledge. got 2 phones working on it, thanks to our annonomous LG guys for the unbricking
https://mega.nz/#!95ZSCARR!dWAG0bd5zi3DQUal3gfB4nMH-zmIR0H0kdCXBdWGLQk
password = wang276634161
vegito6 said:
works great, after flashing with LG Flash tools tot method just take out battery and wait 5sec, and put it back in and turn on, android logo will show and then it will boot normally, now i'm back to working on the supersu install methods to help people from bricking, wish me luck . also backing up boot img and then trying to use super sume to switch to still will cause boot looping to my knowledge. got 2 phones working on it, thanks to our annonomous LG guys for the unbricking
https://mega.nz/#!95ZSCARR!dWAG0bd5zi3DQUal3gfB4nMH-zmIR0H0kdCXBdWGLQk
password = wang276634161
Click to expand...
Click to collapse
works just fine!!!! lg stylo is back!!! thanks vegito ,....
vegito6 said:
works great, after flashing with LG Flash tools tot method just take out battery and wait 5sec, and put it back in and turn on, android logo will show and then it will boot normally, now i'm back to working on the supersu install methods to help people from bricking, wish me luck . also backing up boot img and then trying to use super sume to switch to still will cause boot looping to my knowledge. got 2 phones working on it, thanks to our annonomous LG guys for the unbricking
https://mega.nz/#!95ZSCARR!dWAG0bd5zi3DQUal3gfB4nMH-zmIR0H0kdCXBdWGLQk
password = wang276634161
Click to expand...
Click to collapse
Great job man. It is people like you who keep the community going.
Su binary installation failed!
Mooose-Nuckle said:
I'm pretty sure that you ended up with brick because you didn't unlock your bootloader before backing up. My girlfriend did the same thing. As of right now I'm trying to figure out If there's a way past the bootloader or at least a way to do everything the bootloader can do without unlocking it.
Click to expand...
Click to collapse
well not really, because if you go into the developer options there is the oem bootloader unlock you can select, not sure but i've got a cricket and boost version i've been working on it for a while, for some reason the phone doesn't like the way SU gets injected into the phone, and writes things to the wrong areas, i've been playing with some scripts for superuser installers from zip, hopefully i get a hit.
---------- Post added at 09:48 AM ---------- Previous post was at 09:47 AM ----------
jxs714 said:
Great job man. It is people like you who keep the community going.
Click to expand...
Click to collapse
thats the life of us programmers and developers thats trying to get better lol, we just share the knowledge passed down lol
vegito6 said:
well not really, because if you go into the developer options there is the oem bootloader unlock you can select, not sure but i've got a cricket and boost version i've been working on it for a while, for some reason the phone doesn't like the way SU gets injected into the phone, and writes things to the wrong areas, i've been playing with some scripts for superuser installers from zip, hopefully i get a hit.
---------- Post added at 09:48 AM ---------- Previous post was at 09:47 AM ----------
thats the life of us programmers and developers thats trying to get better lol, we just share the knowledge passed down lol
Click to expand...
Click to collapse
I noticed there is no solution posted. I recently bricked my phone and fixed it, thanks to you. I was simply wondering of there has been progress with getting the framework installed. Your help is much appreciated.
So I'm sort of confused... I cannot install xposed, and can't seem to find a work around. I am rooted but not with kingroot. I used a one click root tool on pc, and works great... Using su that is suggested using in this guide, so no trace of king root. Idk, could someone give me a quick run down on how to install xposed?
So no luck with installing xposed yet
So far I am rooted with Super SU and have exposed installer I'm just having a hard time getting the framework installed. I do not have custom recovery installed. Is there any way to flash the framework zip file with like flashify or another app like that?

LG Stylo 2 (LS775) root?

I recently purchased an LG Stylo 2. It just came out and I am looking to root it. However, I have not found a way to root it, both manually and through any one-click software. I had an LG Volt before this, that I rooted manually. However, I have yet to come across any method to rooting the LG Stylo 2. Is there any method as of late?
nothing yet
DownrightDisturbing said:
I recently purchased an LG Stylo 2. It just came out and I am looking to root it. However, I have not found a way to root it, both manually and through any one-click software. I had an LG Volt before this, that I rooted manually. However, I have yet to come across any method to rooting the LG Stylo 2. Is there any method as of late?
Click to expand...
Click to collapse
No nothing yet! Tried KingRoot but it failed as far as a more complex method none are out yet
Have you guys tried to unlock your bootloaders? Or tried adb to open TWRP without installing it then flashing SU?
Sent from my LGMS631 using XDA-Developers mobile app
hi I just bought LG Stylo 2 and tried to root with kingroot apk it showed me success when ii tried to update SU Binary it was rebooted and stuck on boot loop with message root verification failed mismatch sig-len i dont know what does it means no flashable stock rom is available yet .......please can anybody help me out... feeling sad...
please help ...
Kingofspades2957 said:
No nothing yet! Tried KingRoot but it failed as far as a more complex method none are out yet
Click to expand...
Click to collapse
can you take dump of the the phone and upload it system_com13 file.. it is very urgent if any one else have it please help me to make some recovery.
Kingofspades2957 said:
No nothing yet! Tried KingRoot but it failed as far as a more complex method none are out yet
Click to expand...
Click to collapse
Hi, bro can you please help me out can you share the backup of your system files ... I need it badly struggling alot it is only a month old Phone and not owned by lot of people... so please share the files so i can recover it ...
Thanks a LoT
no one wants to help??????????
chaddhaaman said:
no one wants to help??????????
Click to expand...
Click to collapse
I found this in xda forums. Could this help you?
http://forum.xda-developers.com/lg-g-stylo/how-to/untouched-6-0-1-boost-sprint-t3285764
TWRP / Bootloader
JMarvelous said:
Have you guys tried to unlock your bootloaders? Or tried adb to open TWRP without installing it then flashing SU?
Heya - Yeah the boot loader will unlock from ads fastboot in a sec. the fastboot on the phone (I have the ms550 Metro version) is crippled, however. it will not fastboot boot so you can't just grab a twrp and test it by throwing it at it. I would like to test more, I'm willing to flash whatever since I know the download mode will let us fix all....I'm just trying to get a kdz file so I can have it in the background just in case I totally F it up
Obviously without the twrp I can't flash any of the su versions.
My spidey sense tells me it's not that far away for us. Just be patient. I love the phone ( I liked my G Stylo as well)
Click to expand...
Click to collapse
If I'm not mistaken I believe the phones are pretty much the same specs still aside from the camera. I have a bootable TWRP. If you run ATB you can boot into this trip without installing it I'd be more than happy to upload it for you guys. I believe the original maker was either Game Theory or DrakenFX.
---------- Post added at 11:00 PM ---------- Previous post was at 11:00 PM ----------
It's worth a shot since download mode will fix anything but you just need that kdz file
JMarvelous said:
If I'm not mistaken I believe the phones are pretty much the same specs still aside from the camera. I have a bootable TWRP. If you run ATB you can boot into this trip without installing it I'd be more than happy to upload it for you guys. I believe the original maker was either Game Theory or DrakenFX.
---------- Post added at 11:00 PM ---------- Previous post was at 11:00 PM ----------
It's worth a shot since download mode will fix anything but you just need that kdz file
Click to expand...
Click to collapse
Can you do that for us along with instructions? I'm kinda scared to do anything with my Stylo 2 since its basically untested and it is my daily driver.
Here ya go...boot zip with instructions
When you are supposed to boot the zip... Type in : fastboot boot.zip instead of twrpblah blah blah....i renamed it to be easier
Any way to flash this twrp thing your talking about without a comp..ill be honest ive only just started to root the last couple phones i owned and have tried to flash any kernels or roms or custom recoverys...but i really want to change up this stylo 2..and the opting out of adpotable storage lg sony and few others did is drove me crazy..i wish i woulds known before i bought this dumb thing
JMarvelous said:
When you are supposed to boot the zip... Type in : fastboot boot.zip instead of twrpblah blah blah....i renamed it to be easier
Click to expand...
Click to collapse
I'm confused. Does installing TWRP get us any closer to root? I mean it's good to be able to get a backup, but it's really root that I want.
Style 2
If boot loader is unlocked in a sence u can get root by pushing su right? And how do u get into factory recovery?
In the event that this fails (Since I have the Stylo 2 and not the Stylo) and my phone bricks, is there a program to de-brick?
Hmm, When I type in "adb reboot bootloader", my phone reboots. back to the lockscreen.
Mine does to I can put it in fast boot with out the PC but then can't get PC to find it that way

Need a T-Mobile user with an unlocked bootloader to test something out

i have modified LGUP to flash individual partitions, but being as i do not own the G6 i cannot test it out for myself. if someone would like to test out possibly being the world's first G6 user with TWRP on it please respond to this!
EDIT: I have gotten a tester and my modded LGUP will dump the partitions of the device, but will not write yet...
Hey
Honestly Annoying said:
i have modified LGUP to flash individual partitions, but being as i do not own the G6 i cannot test it out for myself. if someone would like to test out possibly being the world's first G6 user with TWRP on it please respond to this!
Click to expand...
Click to collapse
I could test when I get home.I have rooted a lot of phones and would like to see twrp on this device
There's hope.
Sent from my LG-H872 using Tapatalk
Ok now where is the file? i'm new with g6 always do nexus give the instruction and i will test for you i'm ready to test and root my great first Android phone without root and i'm love how its work with out i can't imagine with root!!!!
If you upload the files with some instructions I can test it. How likely is it to brick the phone? Assuming it's only trying to flash a recovery it shouldn't be too hard to fix if anything goes wrong, but I just want to be safe.
This is my first LG device so some instructions on all the LGUP stuff would be appreciated.
Ok . I have unlocked my bootloader. What do you me to test?

Help with LG V20 US996 demo unit unlocking boot loader failed at LG developer website

Hi, i hope this is the right forum, i am a noobie at LG flashing, been reading some, but it is a little confusing (coming from Oneplus One), so i bought an LG V20 - US996, and i thought i could unlock the bootloader via LG Developers website, so i started the process, install drivers, follow the instructions, etc. then when i submitted IMEI and device id i got an error, message, stating :your device (TEST_GPIN) does not support unlocking bootloader", i emailed LG with the question but still no answer, so i did a little research and found out that my phone is a demo unit or something like it. on the inside sticker it says "not for sale" the model on the sticker is US996. i have attached some screens that show software versions etc.
so basically i would like to know if anyone knows if i am out of luck and cant unlock the bootloader to flash twrp and root, or if it can be done, and point me in the right direction, any help will be greatly appreciated.
i obviously would not want to brick my device, but am willing to try to unlock if possible.
thanks.
That's very interesting. Wondering if that's the model the debug bootloader was pulled from to root the US carrier v20's. I'm not an expert in this but have you tried to flash the us99610f (Dec 1 2016 sec patch) kdz using LG UP. That should put you on official LG firmware that is still rootable. The kdz will flash every piece of firmware getting you off of that demo firmware. From there you could try to unlock the bootloader again using LGs website, or worst case use dirtysanta to root the phone if you wish. There's a hacked lgup thread somewhere in the guide section that should do the trick.
thanks toastyp, i will download 10f, and look for the hacked lgup.
rluque35 said:
thanks toastyp, i will download 10f, and look for the hacked lgup.
Click to expand...
Click to collapse
Here's the link just in case
https://www.google.com/amp/s/forum....e-patch-lgup-to-unlock-features-t3652222/amp/
thanks guys, i used LGUP from Prowler_gr thread https://forum.xda-developers.com/v20/how-to/guide-patch-lgup-to-unlock-features-t3652222/page8 Thanks by the way.
downloaded 10f, and flashed with LGUP, no i have a fully working US996 (not demo version) at US99610f, i will keep reading so i can do the bootloader unlock and root.
thanks again for your help
rluque35 said:
thanks guys, i used LGUP from Prowler_gr thread https://forum.xda-developers.com/v20/how-to/guide-patch-lgup-to-unlock-features-t3652222/page8 Thanks by the way.
downloaded 10f, and flashed with LGUP, no i have a fully working US996 (not demo version) at US99610f, i will keep reading so i can do the bootloader unlock and root.
thanks again for your help
Click to expand...
Click to collapse
Glad everything worked for you. I would try to root using LGs official unlock.bin method as it will be the easiest way to root the phone. Plus you get to keep your stock bootloader which is potentially helpful in the event LG implements ARB on the us996. If it still doesn't work you can try the dirty elf thread. I believe it's the dirtysanta method for the us996. This process will flash a debug bootloader with full fastboot commands that is unlocked. From there you can flash twrp normally.
https://www.google.com/amp/s/forum....0-h915us996-dirtyelf-bootloader-t3568013/amp/
thanks toastyp, LG official unlock still not working, as i guess the IMEI is still recognized as from a demo unit, i will try dirty elf method, might take a while since my home pc just died (mobo or cpu) anyway , as soon as i can i will try it.
thanks.

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