[Q] Unable to boot into Fastboot, Recovery or Flash mode - Xperia Z1 Q&A, Help & Troubleshooting

Hello guys,
Today I am encountering a very weird issue. I was on CM12 nightly on my xperia z1 and I decided to check the official Sony firmware since I was curious. I downloaded the official update from Sony PC companion and flashed the files with flashboot. After the "android is upgrading" window with all the apps being updated the device suddenly reboots. I thought okay it might be normal but it is now stuck on that procedure. It attempts to boot goes through the logos and in the animation but restarts again.
I tried booting into recovery to wipe data cache etc. but turns out the device is unable to boot into recovery and instead it attempts to boot normally.
Afterwards I attempted going into fastboot and flashmode and the device just shows the charging screen. Not even the notification light reacts accordingly to the mode I am trying to boot into.
I also tried adb but it didn't find the device.
All help is highly appreciated.
Many thanks in advance to anyone who has any idea on how to resolve this issue.

Use flashtool to reflash your system.

bimasakti85 said:
Use flashtool to reflash your system.
Click to expand...
Click to collapse
What's wrong with people these days? Did you even read what the OP posted? If you did (even if you just read the title) you were able to see that he is NOT able to boot into flash mode rendering flashtool useless in this case!

noahvt said:
What's wrong with people these days? Did you even read what the OP posted? If you did (even if you just read the title) you were able to see that he is NOT able to boot into flash mode rendering flashtool useless in this case!
Click to expand...
Click to collapse
How come he can see boot logo but cant enter flashmode!? I think he did it the wrong way to enter flashmode.
Sent from my XT1095 using Tapatalk

flash mode and fastboot mode cant recognize the phone but still can boot in to sony logo?
it werd did you try it with another PC or USB cabble? and full charged z1 before try all method again, maybe problem is your phone out of battery.
try some some official repair as sony companion or Sony update service.
we cant do anything if both of flash mode and fastboot mode not work.

Related

[Q] Unable to access Fastboot mode

I read through many threads and have followed the official Sony bootloader unlocking instructions. I have requested and received the unlock code from Sony via email. I have downloaded the inf file and placed it in the correct folder in Android SDK (which I also updated). But I am cannot access fastboot mode, I hold down Vol + and plug in the USB cable but the device shows a red led and goes into charging mode. Also the PC never prompts me to install fastboot driver it simply loads the SP as Sony mass storage device (in device manager).
I have read that some people seem to think that the SIM lock affects the ability to access fastboot but this SP is SIM unlocked. Sony's official guide to unlocking the bootloader says I need to access fastboot mode to enter the unlock code but how can I unlock the bootloader if I can't get into fastboot mode?
hmmm... don't know really... i once entered fastboot mode by mistake, while trying to root stock rom. wasn't reading instructions and put device in a fsatboot mode instead of debugging... was on stock rom so don't know if custom rom would let me do that. should check myself... if anything i know it is possible to get me that blue light shining.
To enter fastboot mode in Xperia SP just power down the phone and hold down the volume up key while pluging your phone into your pc
If you need flashmode do the same thing but with the volume DOWN button held down.
I´ve got the same problem. I can´t enter in flashmode neither in fastboot mode. I´m on windows 8 32bits and I installed the .245 Deodexed ROM with a problem on root and without CWM. I don´t know what to do now, please help me.
As I explained in the first post, I understand how to access fastboot mode (and flash mode). I got root and backed up the TA partition, the stock apps (from 1.257) and backed up the stock ROM. Then, after I wasn't able to get into fastboot, I have installed CWM for LB and flashed a custom ROM based on 2.245. I am able to enter flash mode but not fastboot. As I said before, the phone is SIM unlocked but is acting like it came from a carrier, with locked bootloader and fastboot disabled. How can Sony disable fastboot? I don't get it. Any one want to take a guess how long I will have to wait until some clever dev finds an exploit?
gandalf_grey91 said:
As I explained in the first post, I understand how to access fastboot mode (and flash mode). I got root and backed up the TA partition, the stock apps (from 1.257) and backed up the stock ROM. Then, after I wasn't able to get into fastboot, I have installed CWM for LB and flashed a custom ROM based on 2.245. I am able to enter flash mode but not fastboot. As I said before, the phone is SIM unlocked but is acting like it came from a carrier, with locked bootloader and fastboot disabled. How can Sony disable fastboot? I don't get it. Any one want to take a guess how long I will have to wait until some clever dev finds an exploit?
Click to expand...
Click to collapse
Sorry for that i dont think that it is your computers fault because you enter fastboot (and flashmode) using your mobile phone NOT your PC
So i would roughly assume that this is a Rom bug or something in the flashing proccess went wrong.
jackaros said:
Sorry for that i dont think that it is your computers fault because you enter fastboot (and flashmode) using your mobile phone NOT your PC
So i would roughly assume that this is a Rom bug or something in the flashing proccess went wrong.
Click to expand...
Click to collapse
Thanks for trying to help, but I understand that flashmode and fastboot are accessed using the phone. Actually the phone needs a piece of software like flashtool to keep it in flashmode otherwise it drops into charging mode. I didn't mention my computer so I don't know where you got that from.
As I explained, I am unable to access fastboot with stock ROM (1.257) and a custom ROM (based on 2.245) so it can't be a ROM bug or the flashing process having gone wrong.
if it's not too much of a trouble for you, go and flash .245 stock, than .257 stock kernel only. like you are trying to root it for the first time, complete rooting procedure, and than proceed on to installing CWM, but instead of connecting device in debugging mode to install CWM, try and see if you can put it in a fastboot. this was exactly the moment when i accidentally put mine SP in fastboot. of course, i'm not saying to go ahead and install anything if you score, but only to confirm if you can put your device into a fastboot mode since installing anything without CWM will likely soft brick your device.
Same problem here, i can't do anything using flashtool after flashed 2.245. I did with SUS, maybe is some flashtool issue.
Ze Tolas said:
Same problem here, i can't do anything using flashtool after flashed 2.245. I did with SUS, maybe is some flashtool issue.
Click to expand...
Click to collapse
It may be a flashtool problem you are right because 2 incidents with different Roms that both use flashtool to flash those roms.....
its pretty much self explenatory.
skojevac said:
if it's not too much of a trouble for you, go and flash .245 stock, than .257 stock kernel only. like you are trying to root it for the first time, complete rooting procedure, and than proceed on to installing CWM, but instead of connecting device in debugging mode to install CWM, try and see if you can put it in a fastboot. this was exactly the moment when i accidentally put mine SP in fastboot. of course, i'm not saying to go ahead and install anything if you score, but only to confirm if you can put your device into a fastboot mode since installing anything without CWM will likely soft brick your device.
Click to expand...
Click to collapse
Interesting. Ok, I've read up on the process. So I use the various stock .ftf files and flashtool with the phone in flash mode? Bear in mind that kernel didn't allow fastboot when I used it with the stock .257 ROM the device came with. If I do it, I will nandroid backup first, of course, but I think I remember reading in one thread that someone managed to soft brick their XSP doing this very thing.
Bear in mind that kernel didn't allow fastboot when I used it with the stock .257 ROM the device came with. [/QUOTE said:
that's why you need to complete rooting procedure. root stock 1.257 kernel, than back to stock 2.245 with root preserved, and before you would install CWM try to put device in a fastboot mode, this assuming you still have a UB.
Click to expand...
Click to collapse
have you tried to boot into android, open a root terminal and type
exec reboot bootloader
that should bring you straight into fastboot
SuicideFlasher said:
have you tried to boot into android, open a root terminal and type
exec reboot bootloader
that should bring you straight into fastboot
Click to expand...
Click to collapse
All that happens is that the terminal session ends and closes (not FC) the terminal app. Using the same command via adb just does a standard reboot.
i just placed my in a fastboot mode, no problems whatsoever. do you have drivers for the device installed? you will find these in flashtool installation folder.
skojevac said:
i just placed my in a fastboot mode, no problems whatsoever. do you have drivers for the device installed? you will find these in flashtool installation folder.
Click to expand...
Click to collapse
Yes. The fastboot_with_android_usb_file.rar package specified on DooMLoRD's bootloader unlocking/relocking appears to have been removed and there are no new links in that thread. So, I found and installed the drivers included with the flashtool. But it seems to be the device that is the problem. It is acting like a carrier locked model. I am rapidly starting to believe that this one has a locked bootloader.
gandalf_grey91 said:
Yes. The fastboot_with_android_usb_file.rar package specified on DooMLoRD's bootloader unlocking/relocking appears to have been removed and there are no new links in that thread. So, I found and installed the drivers included with the flashtool. But it seems to be the device that is the problem. It is acting like a carrier locked model. I am rapidly starting to believe that this one has a locked bootloader.
Click to expand...
Click to collapse
I said before, it's new firmware (maybe RU) with a Windows Flashtool issue. Today i did flash kernel to my SP using Linux client.
Same issues
gandalf_grey91 said:
All that happens is that the terminal session ends and closes (not FC) the terminal app. Using the same command via adb just does a standard reboot.
Click to expand...
Click to collapse
Hi, I have some similar issues. I've also been flashing some stuff and whenever I try to go to fastboot it just boots into CWM. Very annoying to say the least. The dark blue light goes on when i hold down volume up and for a short moment I see the fastboot driver installing on my computer. But before it completes it's already in CWM.
Not sure what to do from here on wards, maybe some advice on which kernel to flash? I am pretty sure the latest kernel I flashed is the .254 root kernel from doomlord.
Ps. I really would like to flash CM when it becomes available as nightly :angel:
Thanks in advance!
Fast boot mode for xperia ion hspa???
gandalf_grey91 said:
As I explained in the first post, I understand how to access fastboot mode (and flash mode). I got root and backed up the TA partition, the stock apps (from 1.257) and backed up the stock ROM. Then, after I wasn't able to get into fastboot, I have installed CWM for LB and flashed a custom ROM based on 2.245. I am able to enter flash mode but not fastboot. As I said before, the phone is SIM unlocked but is acting like it came from a carrier, with locked bootloader and fastboot disabled. How can Sony disable fastboot? I don't get it. Any one want to take a guess how long I will have to wait until some clever dev finds an exploit?
Click to expand...
Click to collapse
I had already installed cm10.1 jb for my xperia ion.
Now i tried to install cm11 kitkat for my xperia ion.
Every thing is gone good.
But now got stuck up with a problem.
fast boot mode is active only for 5 seconds while connecting my xperia ion to System with flash tool.
help me to do the need ful.
Guide me to download compatible drivers and flash tool for fast booting process.
If you have UNLOCKABLE bootloader, then you dont have a FASTBOOT mode on your phone. Its just pure luck. some phones dont have it... kind of a sony crap... I also happen to be one of those LUCKY ppl. no unlock, so stuck with Stock kernel forever.
When you connect your phone to Flashtools in FLASHMODE...
See for a string BOOTLOADER: NOT_ROOTABLE.... it means you belong in the lucky group...
If it says rootable, then you're doing something wrong.
Pardon me if i read something incorrect. i skimmed through all the posts before posting.

help please- locked bootloader, fastboot woes

picked up a Z1 and went straight to rooting it.
rooted succesfully, installed the dualrecovery, and then attempted ot install VANIR only to realize that i did not unlock the bootloader.
so it will not turn on. holding power it vibrates every 2 seconds. plugged in it does teh same, but also blinks red.
i can get the computer to recognize it several different ways.
blue led- fastboot interface in device manager - not detected in adb devices
red/green/blank led - SOMC flash - no adb
PC companion is no go.
I have no idea where to go from here. I am currently downloading flashtool to see where that gets me, but I was hoping someone might have some direct and well known solution that i did not uncover in my searching..
Thanks
jewnersey said:
picked up a Z1 and went straight to rooting it.
rooted succesfully, installed the dualrecovery, and then attempted ot install VANIR only to realize that i did not unlock the bootloader.
so it will not turn on. holding power it vibrates every 2 seconds. plugged in it does teh same, but also blinks red.
i can get the computer to recognize it several different ways.
blue led- fastboot interface in device manager - not detected in adb devices
red/green/blank led - SOMC flash - no adb
PC companion is no go.
I have no idea where to go from here. I am currently downloading flashtool to see where that gets me, but I was hoping someone might have some direct and well known solution that i did not uncover in my searching..
Thanks
Click to expand...
Click to collapse
you have to flash a new firmware from flashtool.this will solve your problem.you cant enter to recovery?
Sent from my C6903 using XDA Premium 4 mobile app
Anonymuszymus said:
you have to flash a new firmware from flashtool.this will solve your problem.you cant enter to recovery?
Sent from my C6903 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
He will not be able to enter recovery because dual recovery is system based which he cannot get to as its now trying to boot a custom kernel with a locked bootloader.
Also the recovery on a custom kernel is in the kernel, which also cannot boot. Hence a bootloop with no chance of recovery mode
The solution should be easy enough
Flash a stock FTF for your device using flashtool
gregbradley said:
He will not be able to enter recovery because dual recovery is system based which he cannot get to as its now trying to boot a custom kernel with a locked bootloader.
Also the recovery on a custom kernel is in the kernel, which also cannot boot. Hence a bootloop with no chance of recovery mode
The solution should be easy enough
Flash a stock FTF for your device using flashtool
Click to expand...
Click to collapse
downloading flashtool now.
Will flashtool recognize the phone even though adb does not?
this for ftf?
http://xperiafirmware.com/8-firmware/42-sony-xperia-z1-c6903
this for bootloader?
http://forum.xda-developers.com/showthread.php?t=2440597
jewnersey said:
downloading flashtool now.
Will flashtool recognize the phone even though adb does not?
this for ftf?
http://xperiafirmware.com/8-firmware/42-sony-xperia-z1-c6903
this for bootloader?
http://forum.xda-developers.com/showthread.php?t=2440597
Click to expand...
Click to collapse
Look in the general section for a sticky thread called FTF mega collection for the best FTF file for you.
Once you have flashed that then you should* root, then unlock the boot following the official sony instructions (http://bit.ly/1cebNlh).
once you have done that flash the boot.img of the rom you want to flash using fastboot them flash the update.zip in recovery
*The reason to root before unlocking the boot is to backup the DRM keys in your TA partition. If you do not do that you lose them forever.

[Q] Sony xperia bootlooped

I unfortinately formated system in clockworkmod touch recovery. Afterwards phone gets stuck at sony logo when i power on the phone. Am able to boot into fastboot and flashmode using key combinations but cant enter into the clockworkmod with key combinations as i used to do before the system format. However, i unlocked my bootloader and rooted the device before i had this problem. As a result, am not able to get sony pc companion to repair my phone. I tried flashtool but then upon flashing, it asks me to enable usb debug mode and am not able to enable debud mode since the phone doesnt boot past the sony logo.
I will appreaciate it greatly if anyobe can help me get my cute phone out of this situation
On android 4.0.4
Sorry if i posted in a wrong forum.I'm new here
Deshycrane said:
I unfortinately formated system in clockworkmod touch recovery. Afterwards phone gets stuck at sony logo when i power on the phone. Am able to boot into fastboot and flashmode using key combinations but cant enter into the clockworkmod with key combinations as i used to do before the system format. However, i unlocked my bootloader and rooted the device before i had this problem. As a result, am not able to get sony pc companion to repair my phone. I tried flashtool but then upon flashing, it asks me to enable usb debug mode and am not able to enable debud mode since the phone doesnt boot past the sony logo.
I will appreaciate it greatly if anyobe can help me get my cute phone out of this situation
On android 4.0.4
Sorry if i posted in a wrong forum.I'm new here
Click to expand...
Click to collapse
You can try with Emma, it works only with unlocked bl. You can find it somewhere on Sony web page (google it).
Help
neoxx3m said:
You can try with Emma, it works only with unlocked bl. You can find it somewhere on Sony web page (google it).
Click to expand...
Click to collapse
Emma does not support xperia sola at the moment. Any suggestion please
Deshycrane said:
Emma does not support xperia sola at the moment. Any suggestion please
Click to expand...
Click to collapse
If you can get in fastboot mode you can allways relock your BL and repair it via PC Companion.

xperia Z3c bootloop after flashing CWM

I recently got a z3c and decided to try to get a slim rom on it.
I have done the following:
I unlocked the bootloader.
This was done successfully to the best of my knowledge
The next thing I did was flash a cwm image to by z3c using fastboot. The problem was that I flashed the z3 version on my z3c.
The device would boot but the screen would be blank.
Later I flashed the z3c boot loader named : Z3c_DooMLoRD_AdvStkKernel_v01_FW-105
After this the device goes in a boot loop. I am able to access CWM.
I have tried to root the phone as well as flash the slim rom in an attempt to fix it....
Wiping disk / cache doesn't help.
Also for some reason even though adb drivers are installed I cannot use it so I can't get the twrp install to work.
I have no idea what to do can someone please help?
Thanks,
stp
I have same issue....Phone is ib bootloop...i can still go to fastboot mode....
Anything can be done here????
Flash an factory image with flashtool then you will have original recovery. Then reinstall CWM, maybe smth went wrong.
Tried flashtool---Ended up with errors as attached pic
As i cant bootup my phone...USB Debugging option cant be ticked
I was running SlimLP (unofficial) while bricked my phone....
Anything on that please....
I managed to recover my phone. I don't think you need usb debugging for flash tool. What I did was turn the phone off (power and volume up seem to be the buttons that force shutdown and break the reboot loop).
flashtool will prompt you to connect when you flash the ftf file and you hold power up and volume down when you connect the usb cable. If you have issues flashing (it hanged on me on system.bin) try restarting your computer.
Resolution and Problem Exp
Right after flashing the device recovery through fastboot the USB cable is plugged and that seems to loop the boot loader, so you need to force shutdown while looping by pressing POWER + VOLUME UP, and after that unplug the USB cable. You will notice that on boot now the light is no longer red.
splitthepositive said:
I recently got a z3c and decided to try to get a slim rom on it.
I have done the following:
I unlocked the bootloader.
This was done successfully to the best of my knowledge
The next thing I did was flash a cwm image to by z3c using fastboot. The problem was that I flashed the z3 version on my z3c.
The device would boot but the screen would be blank.
Later I flashed the z3c boot loader named : Z3c_DooMLoRD_AdvStkKernel_v01_FW-105
After this the device goes in a boot loop. I am able to access CWM.
I have tried to root the phone as well as flash the slim rom in an attempt to fix it....
Wiping disk / cache doesn't help.
Also for some reason even though adb drivers are installed I cannot use it so I can't get the twrp install to work.
I have no idea what to do can someone please help?
Thanks,
stp
Click to expand...
Click to collapse

LG L Fino D290n makes error on boot.No download mode or recovery,please help!

Yesterday a LG L Fino was brought to me for repair.It makes an error on boot.The error is the boot certificate verify error.I cannot fix this!
I tried booting in recovery,gives me the boot screen,then the error,black screen.
I tried download mode,same.
I even tried flashing it,but LG Flash Tool does not recognize it.When i connect the phone a whole alphabet of drives would appear with LG Logos on them.I was able to only open one of them,the size was 64MB and it stored a image folder.Device manager recognizes the phone as QHSUSB_BULK and a ton of Unknown Devices would appear,after that they disappear and the phone will be recognized as LGE AndroidNet USB Serial Port(COM4).Thank you :angel:
filipkosteski said:
Yesterday a LG L Fino was brought to me for repair.It makes an error on boot.The error is the boot certificate verify error.I cannot fix this!
I tried booting in recovery,gives me the boot screen,then the error,black screen.
I tried download mode,same.
I even tried flashing it,but LG Flash Tool does not recognize it.When i connect the phone a whole alphabet of drives would appear with LG Logos on them.I was able to only open one of them,the size was 64MB and it stored a image folder.Device manager recognizes the phone as QHSUSB_BULK and a ton of Unknown Devices would appear,after that they disappear and the phone will be recognized as LGE AndroidNet USB Serial Port(COM4).Thank you :angel:
Click to expand...
Click to collapse
Will the device boot to fastboot? Does the device respond to adb commands?
DO NOT CONTACT ME VIA PM TO RECEIVE HELP, YOU WILL BE IGNORED. KEEP IT IN THE THREADS WHERE EVERYONE CAN SHARE
Droidriven said:
Will the device boot to fastboot? Does the device respond to adb commands?
DO NOT CONTACT ME VIA PM TO RECEIVE HELP, YOU WILL BE IGNORED. KEEP IT IN THE THREADS WHERE EVERYONE CAN SHARE
Click to expand...
Click to collapse
Sorry i was inactive,but the LG L Fino is gone now i do not need help.Thank you
Droidriven said:
Will the device boot to fastboot? Does the device respond to adb commands?
DO NOT CONTACT ME VIA PM TO RECEIVE HELP, YOU WILL BE IGNORED. KEEP IT IN THE THREADS WHERE EVERYONE CAN SHARE
Click to expand...
Click to collapse
Hi, I have the same problem, here is the picture of my screen.
I have tried to follow these steps, but my phone cannot enter Secure boot mode.
Any idea what can I do?
thanks
ndr113 said:
Hi, I have the same problem, here is the picture of my screen.
I have tried to follow these steps, but my phone cannot enter Secure boot mode.
Any idea what can I do?
thanks
Click to expand...
Click to collapse
Hey there
I have a LG L90 D410 (Similar Qualcomm Device)
And I faced the same issue after a bad flash.
Did you flash anything?
Does the LG logo show up?
Please answer the above questions so I would be able to solve your problem
Gaptain4 said:
Hey there
I have a LG L90 D410 (Similar Qualcomm Device)
And I faced the same issue after a bad flash.
Did you flash anything?
Does the LG logo show up?
Please answer the above questions so I would be able to solve your problem
Click to expand...
Click to collapse
Hello sir!
I have never flash the phone. The first problem that I have seen was after one restart, it won't boot the os, I have seen the LG logo and after that it keeps reboots again. I have entered in recovery mode and wipe all data, but it didn't help. After that I started to see the message above(error) and that's all. My battery is completely empty and cannot charge it because the phone doesn't charge.
ndr113 said:
Hello sir!
I have never flash the phone. The first problem that I have seen was after one restart, it won't boot the os, I have seen the LG logo and after that it keeps reboots again. I have entered in recovery mode and wipe all data, but it didn't help. After that I started to see the message above(error) and that's all. My battery is completely empty and cannot charge it because the phone doesn't charge.
Click to expand...
Click to collapse
Hey there did you use advanced wipe to clear your data or was it factory reset.
If the LG Logo shows up and then the error comes then you can enter download mode by switching off the phone and then hold volume up key and at the same time insert a usb. You would enter download mode. If you enter the mode you can flash a KDZ
Gaptain4 here at your service :fingers-crossed:
Gaptain4 said:
Hey there did you use advanced wipe to clear your data or was it factory reset.
If the LG Logo shows up and then the error comes then you can enter download mode by switching off the phone and then hold volume up key and at the same time insert a usb. You would enter download mode. If you enter the mode you can flash a KDZ
Or If you want custom rom only,enter into recovery mode.
Then click wipe and then advanced wipe.
Check data
Check System
Check Dalvik/art
Check Cache.
And then Press install and download the suitable rom for you phone.
If you cannot resolve the problem contact me again
Gaptain4 here at your service :fingers-crossed:
Click to expand...
Click to collapse
No, they didn't use advanced wipe because they don't have a custom recovery installed. If you read their post more carefully, you'll see where they said that they never flashed the device, this means they have stock recovery, not custom recovery. None of what you posted helps them.
Sent from my LGL84VL using Tapatalk
Droidriven said:
No, they didn't use advanced wipe because they don't have a custom recovery installed. If you read their post more carefully, you'll see where they said that they never flashed the device, this means they have stock recovery, not custom recovery. None of what you posted helps them.
Sent from my LGL84VL using Tapatalk
Click to expand...
Click to collapse
Hey there thank for informing me.
He can still enter into download mode and flash kdz using flash tool
Custom Rom cannot be flashed
But a stock rom can be flashed and can be fixed.
Its a soft brick so he can surely flash a stock rom and recover his phone :fingers-crossed:\
When you try to charge your phone it doesn't show the charging status
But when you completely drain your battery to 0% it will show 0% and shows charging and you can confirm that it is charging
hi everyone
i have a LG L25
and i think i messed up flashing it using TWRP.
it stuck in FIRMWARE UPDATE screen and i cant access its TWRP mode
please help me
Marclance said:
hi everyone
i have a LG L25
and i think i messed up flashing it using TWRP.
it stuck in FIRMWARE UPDATE screen and i cant access its TWRP mode
please help me
Click to expand...
Click to collapse
Did you try to flash a stock update using TWRP?
If so, that is the problem. Stock updates can't be applied to a rooted device or a device that has TWRP installed, any one or both of these will interfere with applying the update. You can only apply stock updates to devices that have an unmodified system partition(no root, no Xposed) and have stock recovery, stock recovery is required for applying stock updates.
If this is what you did, your only option to fix this is to flash your full stock firmware. Do a Google search for:
"Return to stock (your model number)"
If the tools and files exist for your device, that should find it.
Sent from my LGL84VL using Tapatalk

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