Optimus L9 MS769 Security Error, Please Hold My Hand - LG Optimus L9 P760, P765, P768, P769

Edit: I wanted to link this to the main Optimus L9 Security Error thread but didn't know how, any mod is welcome to do that for me ^_^
Hello XDA!
I recently acquired a LG Optimus L9 MS769 from my sister to use temporarily until I can get a new phone. Before bringing it to me, she tried swapping SIM cards with my mother's to see if that would work (without doing a reset first), which caused it to boot with that infamous Security Error screen. I have tried following just about every thread that I can understand in search of a solution, however I'm sort of stuck due to my limited knowledge in the all-things-android field. Also, I am aware that this sub-forum is for the P76x models, so sorry if I'm asking for help in the wrong spot.
I started with the most obvious suggestion, which was to try using the LG Mobile Support tool with my phone in S/W mode, with hopes of gaining access to perform a hard reset (hopefully that is the correct terminology). Within the driver selection window on the LG Mobile Support tool, there are three separate drivers for the USA MetroPCS model MS769. I tried running to tool with each of them one at a time, with the same result each time. Sometimes my phone would sit in S/W mode and the tool wouldn't detect a connection, so I would try from the beginning again. When I get it right, the support tool detects my phone, but says first that it is fully up to date with version V10F, then once it fully connects the tool tells me "Only wireless upgrades are supported on this phone." I even tried again using a fresh Mobile Support Tool and drivers straight from LG's support website.
Now, there are plenty of guides out there that explain in the most basic ways imaginable for how to flash stock firmware on my device, but all of them that I have read assume I have access to the device in the first place. There were never any alterations done to the ROM so I presume version V10F was the last OTA update MetroPCS sent the Optimus L9. My goal is to have an accessible device that I can hopefully install my own MetroPCS SIM-card in to, converting it into a working phone. So, I don't really mind if you tell me the only way I'm going to unbrick this thing is by loading CWM or CyanogenMod or w/e. I have no preference over a stock ROM or a custom one. As long as it won't re-lock itself when I insert my old SIM I'm in the clear.
Any help, links, comments, or hand-holding through this process will be greatly appreciated!
Thank you in advance for your time,
Gale

Related

flashed wrong kdz

So recently i soft bricked my phone and since i don't have money to spend on a new phone i started to search on the web on what the problem was. i found out that all i had to do was flash my phone so i like the trusting idiot and worried fool trusted the multiple videos that i saw in the metro's and t mobiles kdz is the same. i then flashed ms631 i noticed it was wrong when i booted it up an metro appeared, so i decided to search forums and found out that i needed h631 since that is regular t mobile. i found some downloads of different h631 but when i try to flash that on it goes through the first but when it get ready to apply it says contact system admin. i really need to fix this phone i tried normal and cse flash and still get the same results and i don't understand how the download links work that take you to lg's site since nothing pops up. is there a way to remove the stupid mistake i did or do i really need to buy another phone, i cant unlock the phone since metro has a dumb device unlock app that they use instead of obtaining the unlock code. the phone is a t mobile lg g stylo
rood5000 said:
So recently i soft bricked my phone and since i don't have money to spend on a new phone i started to search on the web on what the problem was. i found out that all i had to do was flash my phone so i like the trusting idiot and worried fool trusted the multiple videos that i saw in the metro's and t mobiles kdz is the same. i then flashed ms631 i noticed it was wrong when i booted it up an metro appeared, so i decided to search forums and found out that i needed h631 since that is regular t mobile. i found some downloads of different h631 but when i try to flash that on it goes through the first but when it get ready to apply it says contact system admin. i really need to fix this phone i tried normal and cse flash and still get the same results and i don't understand how the download links work that take you to lg's site since nothing pops up. is there a way to remove the stupid mistake i did or do i really need to buy another phone, i cant unlock the phone since metro has a dumb device unlock app that they use instead of obtaining the unlock code. the phone is a t mobile lg g stylo
Click to expand...
Click to collapse
Is this still an issue or have you found a fix?
Sent from my LG-H631

please help not able to root / not able to boot into recovery

Hi Fellow Users!
I just bought LG v10 yesterday with international warranty even though i live in UAE, the problem is i am following all the steps from "step by step guide to root for tmo" but unfortunately i am not able to boot into phone recovery which is odd for me as i am a long time user of android, is that possible my phone doesn't have one? I tried everything adb, manually but nothing worked, i once booted my phone into recovery via adb but i saw green android picture with no command written on it and fastboot didn't worked there so there is that.
1) i tried dirty_cow but stuck at getenforce "permissive didn't appeared which is must needed, i think its related to my bootloader"
2) should i follow LGUP procedure even i am not sure my bootloader is unlocked?
P.S my phone is TMO although its unlocked to use any network.
Please advise, thank you
Unfortunately flashing KDZ file bricked my phone, :crying:
Now its just off it doesn't turn on tried everything any advise?
Update: Went to LG TechServe and handed over my phone to re-flash the original firmware, bad thing they don't cover international warranties as i live in UAE and the model i have is TMO with international warranty so there's that.
Reason to share the story, may people learn from this.
Have you tried with Kingroot app or kingoroot app? These apps can root many devices.

Problem with unlocking bootloader LG H960a V10, please help

I have an European version of LG V10 H960a, Android 6.0. The official LG website provides an instruction how to generate an boot image for this phone with adb and fastboot. I did everything according to their instructions, I generated a device ID,I put both dev ID and IMEI to proper boxes in their website and after clicking "Confirm" each single time I received a message "Device ID is unmatched. Please check device ID...". I have been trying to repeat whole process by connecting via VPN from Polish IP number, because phone was bought in Poland while currently I am in UK. I created new account, I did everything accordingly to their instructions and still same. I have tried to contact with LG via email address given on their unlocking website [email protected] but they even did not bother to answer my emails and I tried to contact them TWICE! If someone have an idea how to unlock bootloader please help.
Regards
Voytek
Mu bootloader is unlocked BUT it does not have a write command... Its been removed and I cannot write a file to the rom through ADB. It says its successful but nothing writes to the rom. There is NOTHING I can do to root it short of removing the device and copying an image of the boot partition to it through Octopus or something like that. I'm pretty good with the V10 (H901) and have rooted several over a couple of years in succession until it dies with the usual bootloop hardware issue on the motherboard. I'm certain it's the most unreliable smartphone out there. I'm at the point of throwing the damn thing against a wall and being DONE with ALL of LG products forever.

LG Stylo 5 looking for S-off, unlock bootloader, root info/help?

Hi Everyone,
I just upgraded from a Samsung S5 to an LG Stylo 5 LG LM-Q720VS (Verizon US). Can anyone point me in the right direction? I'm looking for general information about the phone I've searched for "LG Stylo 5" and Q720VS and not had much luck. Is there an XDA forum for the Stylo 5? Is it just really that unpopular?
I'm specifically looking to Unlock the Bootloader Install TWRP, and LineageOS (or any rom without Verizon Bloat) and have root.
Thanks for reading, Happy 2020!
evilbob01 said:
Hi Everyone,
I just upgraded from a Samsung S5 to an LG Stylo 5 LG LM-Q720VS (Verizon US). Can anyone point me in the right direction? I'm looking for general information about the phone I've searched for "LG Stylo 5" and Q720VS and not had much luck. Is there an XDA forum for the Stylo 5? Is it just really that unpopular?
I'm specifically looking to Unlock the Bootloader Install TWRP, and LineageOS (or any rom without Verizon Bloat) and have root.
Thanks for reading, Happy 2020!
Click to expand...
Click to collapse
Verizon device have locked bootloaders, this prevents a lot of Verizon devices from ever gaining root and the bootloader can't be unlocked, which means TWRP and Magisk can never be safely flashed on your device. The only hope that Verizon devices have of being rooted is if one of the universal rooting apps on android and the universal rooting programs on PC just happens to have an exploit that works on the device in question.
All I can say is try all of these apps and programs that you can find and hope for the best, you might get lucky, but I doubt it. Don't ask for examples of these apps and programs, there are too many to name, just look for as many different kinds of rooting apps/programs that you can find and try them.
My REAL advice is, if you like rooting and customizing your devices, you need to completely avoid buying Verizon devices and choose non-Verizon devices. If you are on the Verizon network, you would be better off to look on Swappa and find an unlocked/unlockable device that can be used on the Verizon network that also has root, TWRP and custom ROMs available. It is always best to do your research to see what devices have root and custom support BEFORE you buy the device, instead of buying the device first and then hoping that there is something available for it. When you buy a device without doing this research, you take your chances because it is a shot in the dark.
Sent from my SM-S767VL using Tapatalk
Thanks for the reply, It's reasonable and good advice.
I'm stuck with Verizon as no other carrier can service my rural US location, The Stylo 5 was free due to a billing error and a sale (no fees, or anything) so I figured why not. I'm familiar with the universal root applications you mentioned and am prepared to try them but I was hoping someone had found success and I simply missed the post somewhere in my searches. I'll put in some effort and report back here if I have any luck.
Thanks again!
evilbob01 said:
Thanks for the reply, It's reasonable and good advice.
I'm stuck with Verizon as no other carrier can service my rural US location, The Stylo 5 was free due to a billing error and a sale (no fees, or anything) so I figured why not. I'm familiar with the universal root applications you mentioned and am prepared to try them but I was hoping someone had found success and I simply missed the post somewhere in my searches. I'll put in some effort and report back here if I have any luck.
Thanks again!
Click to expand...
Click to collapse
The universal apps and programs have been almost useless since the release of Marshmallow/Nougat.
Btw, I forgot to mention in my previous reply that S-off is a HTC thing, other brands don't use S-off.
Can the stylo 5 be rooted for T-Mobile?
Stylo 5 / LM-Q720PS from Boost Mobile? Can you help me please ROOT?
Droidriven said:
Verizon device have locked bootloaders, this prevents a lot of Verizon devices from ever gaining root and the bootloader can't be unlocked, which means TWRP and Magisk can never be safely flashed on your device. The only hope that Verizon devices have of being rooted is if one of the universal rooting apps on android and the universal rooting programs on PC just happens to have an exploit that works on the device in question.
All I can say is try all of these apps and programs that you can find and hope for the best, you might get lucky, but I doubt it. Don't ask for examples of these apps and programs, there are too many to name, just look for as many different kinds of rooting apps/programs that you can find and try them.
My REAL advice is, if you like rooting and customizing your devices, you need to completely avoid buying Verizon devices and choose non-Verizon devices. If you are on the Verizon network, you would be better off to look on Swappa and find an unlocked/unlockable device that can be used on the Verizon network that also has root, TWRP and custom ROMs available. It is always best to do your research to see what devices have root and custom support BEFORE you buy the device, instead of buying the device first and then hoping that there is something available for it. When you buy a device without doing this research, you take your chances because it is a shot in the dark.
Sent from my SM-S767VL using Tapatalk
Click to expand...
Click to collapse
First time/new user Thankful found this network of helpful users I found. Can you or someone please help me with how to root my stylo-5 / LM-Q720PS for Boost Mobile. Thank you again for all your time and help. It seems like you know what your talking about Thank you.
Details_Count_Lifestyle said:
First time/new user Thankful found this network of helpful users I found. Can you or someone please help me with how to root my stylo-5 / LM-Q720PS for Boost Mobile. Thank you again for all your time and help. It seems like you know what your talking about Thank you.
Click to expand...
Click to collapse
I'm almost certain that the bootloader is locked on that device. You need to verify whether it is locked or unlocked. If it is locked, that rules out using TWRP or Magisk to root the device and leaves you with the same options as I described in my post that you quoted when you made your reply, which is, to use the universal apps and PC programs designed to root android devices. But, to be honest, I doubt any if them will work, but it is worth trying.
Supposedly, this method will unlock your bootloader:
https://www.androidnature.com/how-to-unlock-lg-stylo-5-bootloader-commands-steps/
If that actually works, then you should be able to use Magisk to root your device. The Magisk method will require you to modify the boot.img in your device yourself, but it's easy, it's just an app and a few clicks to generate the modified boot.img. Try the unlock method that I linked, if it works, then I'll help you with the next stage in the process. If it doesn't work, you will have to resort to using the universal apps and programs that I mentioned.
Just do some searches for:
"Apps to root android"
And
"PC programs to root android"
Try all of them that you can find.
Sent from my SM-S767VL using Tapatalk
Just some Lg Stylo 5 love baby
Since he/she never responded I am going to try the steps mentioned, just purchased me Lg Stylo 5 from eBay for a cool $65, got a great deal, only problem is the fingerprint scanner is damaged but it's a cheap fix. Its the METRO PCS version so I'm pretty sure it's unlockable. I really appreciate your help and would love to see more development and support for the Lg Stylo 5 from the best forum ever!!!
Update... Went into developer options and unlocked the Bootloader then powered off, then powered on holding down and the power button, at the splash screen I briefly released the power button then immediately pressed it again while still holding the volume down button, this gave me the promising white screen that reads do you want to erase all data yes or no, I clicked no. But this is progress, but I can't get into Bootloader mode or downloading mode, I would love if someone can figure this out, I will keep trying!
Brianswanson2011 said:
Since he/she never responded I am going to try the steps mentioned, just purchased me Lg Stylo 5 from eBay for a cool $65, got a great deal, only problem is the fingerprint scanner is damaged but it's a cheap fix. Its the METRO PCS version so I'm pretty sure it's unlockable. I really appreciate your help and would love to see more development and support for the Lg Stylo 5 from the best forum ever!!!
Update... Went into developer options and unlocked the Bootloader then powered off, then powered on holding down and the power button, at the splash screen I briefly released the power button then immediately pressed it again while still holding the volume down button, this gave me the promising white screen that reads do you want to erase all data yes or no, I clicked no. But this is progress, but I can't get into Bootloader mode or downloading mode, I would love if someone can figure this out, I will keep trying!
Click to expand...
Click to collapse
Got a free one on the way now. Were you able to unlock and or root?
careloads said:
Got a free one on the way now. Were you able to unlock and or root?
Click to expand...
Click to collapse
I can't unlock the Bootloader, Lg doesn't support development on there site for this model, so no unlock code
Maybe you will have better luck? Let me know
shinyquagsire23 said:
Hey, just a status update. If you want root and/or custom ROMs on a Stylo 4, do not update beyond 20c and disable automatic updates. Currently working on porting TWRP, but as it stands I have what is effectively a bootloader unlock method. Release will be no sooner than June though but I'm hoping to have everything streamlined for the Stylo 4 /5 (and other LG phones) by then. https://twitter.com/ShinyQuagsire/status/1239749946141806592
Click to expand...
Click to collapse
Just an FYI @ rooting/bootloader unlocking, developing a method at the moment using a Stylo 4, however I have a Stylo 5 and will be porting to it next. Highly suggest disabling automatic updates in the meantime.
Stylo 5 sprint....i have root stealth malware which continually changes kernel install date on each hard reset using buttons. Cant get rid of it..it causes all posts to twitter to be limbo webspoof only visible logged in...logged out they dont exist. Also 911 forwarding and mitm above apartment. Neeeeeeed to root and have saved copy already of lmq720cs_android_pie_1.tar.gz. I use linus but can do wine for the windows twrp etc. Any guidance? Only hope to regain my net im paying 80 a month for. Found 2 malwares ops in name with malwarebytes but did not rectify rootkit. Pretty newbie but terminal commands i can do...also sd card phone.
No Root Metro Stylo 5
shinyquagsire23 said:
Just an FYI @ rooting/bootloader unlocking, developing a method at the moment using a Stylo 4, however I have a Stylo 5 and will be porting to it next. Highly suggest disabling automatic updates in the meantime.
Click to expand...
Click to collapse
If your thinking your going to root a Metro PCS Stylo 5, think again. I've tried almost every outlet...I've watched countless YouTube videos .... No luck. Does ANYONE have one they've actually rooted? I simply cannot and don't believe it's possible.
Ive tried multiple times to unlock fastboot/bootloader but anytime i type adb reboot bootloader it says no device found, when i type fastboot oem device-id it gets stuck on waiting for any device.
Removed
Same problem can't seem to find a way to unlock bootloader or root Stylo 5 metro PCs style phone anyone else have any ideas please help.

State of LG G5 root & custom ROMs end of 2022

Hi folks - after reading through a number of threads on here I can't seem to find a definitive answer to this question now that LG's unlock site is retired:
Is it possible to root and/or install a custom recovery and/or install a custom ROM if you have an LG G5 on a stock ROM right now? I just purchased an unlocked RS988 and would like to do all of the above, but I'm starting to think the scene is dead and/or dying. Can someone confirm / deny the state of modding an LG G5?
I can't even install basic apps like Microsoft Authenticator right now as I'm on RS98810h and my attempts to upgrade by following these instructions ended in an error via LG UP that forced me to use LG Bridge to recover the phone back to a safe condition.
I'd love to mess with it some more but haven't found any current instructions that work. Love this site BTW, I've used it to install custom OSes on many a phone & tablet.
Only H830 can be rooted for any other variants your SOL. It's highly unlikely that root will be achieved for H850 and RS988
Thanks for the info, that's kind of what I concluded from searching around here.
Just wondering, has anyone been able to install Oreo on the RS988 just via normal methods (LG Flash / LG Up)? I know the Verizon version got it (I have one with Oreo) but would love to get it on the RS988 as well. It seems possible, but I just don't have the know-how to cobble together a flashable ROM. I'm sure at this point nobody really cares and has moved on, but if anyone out there knows of a way to do it I'd try anything at this point.
Hi, Its Jan 2023 and I am querying what the chances are of rooting a H850 so I can use it as an appendage to a head unit in an old car with an aux in. I've managed to adb it into bootloader mode and it recognises a the device, but the moment I try 'fastboot oem unlock' I just get 'unknown command' response
My prime need is just to enable auto switch on ( achieved ) and auto switch off when power supply stops. My understanding is that any solution to enable auto shut off requires root..
ebod said:
Hi, Its Jan 2023 and I am querying what the chances are of rooting a H850 so I can use it as an appendage to a head unit in an old car with an aux in. I've managed to adb it into bootloader mode and it recognises a the device, but the moment I try 'fastboot oem unlock' I just get 'unknown command' response
My prime need is just to enable auto switch on ( achieved ) and auto switch off when power supply stops. My understanding is that any solution to enable auto shut off requires root..
Click to expand...
Click to collapse
no longer possible without the lg bl unlock service
ROMSG said:
no longer possible without the lg bl unlock service
Click to expand...
Click to collapse
is there any other methods like dirty santa or engineering abl to unlock lg g5?
cooledi said:
is there any other methods like dirty santa or engineering abl to unlock lg g5?
Click to expand...
Click to collapse
no
Absolutely no love for the LG G5 from the community,
cooledi said:
Absolutely no love for the LG G5 from the community,
Click to expand...
Click to collapse
Actually thats not true. Theres a lot of work going on behind the scenes.

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