Develop Bugs

Nasty Bootloop after Flash on Sprint G2

Last night I installed geefree on my phone from the app store and used it to install TWRP. I downloaded a nightly CM11 and an appropriate gapps. Using geefree I rebooted to recovery (never figured out the button combination to boot to recovery "naturally") and installed both of the zips. This could be where I made my mistake, I installed both at the same time.
Now my phone loops, displaying the LG logo for a few seconds, then shutting off and rebooting before repeating the process. I can't seem to get it to go into download mode or the recovery menu. I've tried power+up, power+down, down+up and each of those while plugging the device in, etc. I can get the device to a hardware key control mode, though it doesn't seem too useful.
How can I save my phone? This forum has been a great resource in the past and I'm very grateful for the many tutorials I've followed rooting other devices. Hopefully you guys can save the day once again!

Volume up plus power is how to access recovery on sprint.
What stock sw version were you on before you flashed cm?
Did you wipe data before flashing?
Sent from my LG-LS970 using xda app-developers app

I was using stock 4.2.2, I believe. I didn't wipe the data (shame on me), a bad habit that I picked up from my first rooted device, the Samsung Moment. It didn't ever matter on that one, afaik. Thanks for the reply!
Edit: Volume up and power whether plugged in or not takes me to the hardware key control mode screen.
Second Edit: http://forum.xda-developers.com/showthread.php?t=2432476&page=35 I also found this thread where someone seems to be experiencing similar issues and they fix it with "LG Utility." Is that a PC application? It's a little vague to google, but I've been trying!

I have a bootloop issue every time i flash a rom i have to wipe all but sd flash roms and gapps the i do a restore from twrp and oly restore my boot image only and they boot no prob

I'm kind of starting to suspect my power button doesn't work at all for whatever reason. I have a lot of difficulty getting the phone to shut down, then it doesn't seem to easily power up. It's a strange collection of problems. Would a Sprint repair place be able to fix this?

If they have parts on hand if not either a swap out or a sendoff

Same problem here - bootloop and no download mode - CWM works! - urgently need help
I guess I have the same problem as InlineFourPower (apart from that my power-button has no problem).
I am stuck in bootloop since I tried to upgrade to Kitkat a few days ago. Now I can´t get into download mode any more, nor into fastboot or anything else. Only CWM works.
From within CWM I can successfully flash ROMs but that doesn´t help, since afterwards I am still stuck in bootloop. It is possible, however, to push files via adb-commands while I am in CWM.
Does anybody have an idea how to go from here or how to get download-mode back?

Device is recognized but can´t be mounted - bricked forever?
Parinibbana said:
I guess I have the same problem as InlineFourPower (apart from that my power-button has no problem).
I am stuck in bootloop since I tried to upgrade to Kitkat a few days ago. Now I can´t get into download mode any more, nor into fastboot or anything else. Only CWM works.
From within CWM I can successfully flash ROMs but that doesn´t help, since afterwards I am still stuck in bootloop. It is possible, however, to push files via adb-commands while I am in CWM.
Does anybody have an idea how to go from here or how to get download-mode back?
Click to expand...
Click to collapse
I tried a few things on Linux.
After terminal-command "ls /dev/sd*" when the device is unplugged from the computer I get "/dev/sda".
When the device is connected via USB, I get: "/dev/sda /dev/sdb"
So sdb is my LG G2.
So I went on to the next command: "gdisk -l /dev/sdb"
As a result I get: "Problem opening /dev/sdb for reading! Error is 123."
Does it mean that the phone isn´t mounted or what? Now I´ve connected my phone to another Linux machine with the same result. It is recognised (p.e. as sdd), but there is no sdd1. Seems as if it is recognized, but can´t be mounted. Does that mean my device is bricked for good? That´s it?

to get the phone into download mode you have to plug the usb cord in and hold VOL+, so to get this right as I have a case on mine, plug the usb into the phone first then hold VOL+ and plug into usb port on the computer.
it does take a loooong time to power down the phone with the button when stuck in a boot loop, just keep holding it until it shuts off, it will shut off eventually!!
plug the phone in while in download mode to install drivers and set com ports, then unplug before you begin your flash with LGFlashTool, hope this helps you out.

Cronic2009 said:
to get the phone into download mode you have to plug the usb cord in and hold VOL+, so to get this right as I have a case on mine, plug the usb in first then hold VOL+ and plug into usb port.
it does take a loooong time to power down the phone with the button when stuck in a boot loop, just keep holding it until it shuts off, hope this helps
Click to expand...
Click to collapse
Thanks Cronic2009 for your advice.
There are, however, szenarios where download-mode is not accessible any more. Neither by using the hardware-keys, nor by using the adb-command.
After four days of resarch and a lot of trial and error, I finally unbricked my F320L using the two adb-commands outlined at the beginning of that thread: http://forum.xda-developers.com/showthread.php?t=2451696
Worked like a charm.
Thanks everyone for your advice.

no problem buddy, glad you got it figured out, good luck to you from here on out!
FYI, that link doesn't work
I just wanted to ask anyone who might know, since the bootloader of the LS980 is locked, we cannot "break" this correct, so no matter what commands we decide to run through root, we cant touch the true bootloader there for LS980 fail safe? (Besides Acts of God, EMP, ect)

Cronic2009 said:
no problem buddy, glad you got it figured out, good luck to you from here on out!
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Click to collapse
Thanks for letting me know. I corrected the link in my previous post.

Be sure if you use a aosp based rom to flash the ZV8 modem. Your can use dr87 or furnance kernals after you flash the zva modem althought i have encountered soft brick due to this.

so i'm having this exact issue and i don't know how to get out of it. i just need to transfer the radio to my phone somehow but nothing shows up under adb devices. i'm trying to the lg mobile support tool now. its downloading the software. but if it doesn't work does any one have any fixes?
edit: i fixed it by following this http://forum.xda-developers.com/showthread.php?p=51637410&highlight=download+fail#post51637410

pitbullmommy45245 said:
so i'm having this exact issue and i don't know how to get out of it. i just need to transfer the radio to my phone somehow but nothing shows up under adb devices. i'm trying to the lg mobile support tool now. its downloading the software. but if it doesn't work does any one have any fixes?
edit: i fixed it by following this http://forum.xda-developers.com/showthread.php?p=51637410&highlight=download+fail#post51637410
Click to expand...
Click to collapse
Thank You for sharing you fixed your issue pittbullmommy but the link you posted points back to a post about a failed run on LGFlashTool, will you please fix the link and point it to the post/guide you used to fix your phone, it may help others stuck in a similar situation, glad to hear you got it fixed and working, best of luck with it from here on out!

Hi all
was just about to start a new thread but didn't want to get into trouble..anyway I am in need of some assistance please.my ls980 has been bricked for some time now been searching all over the internet for a solution to be stuck back at square one.found this video on youtube which is pretty much exactly what my phone is doing.I have used lg flash tool to revert to stock and still nothing I lost root doing that but last night,I managed to regain root access I have no idea how but it happened when i clicked ioroot batch file i went into download mode and it stated bottom left ROOTED in red so i managed that but that is it still doing what is being shown in the video its on youtube
watch?v=PjLF-pBhZSY
please if anyone has the know how I would like to fix this phone rather then bin it thank you all happy 4th everyone

After using tot and flash tool to get back to stock, did you try going into stock recovery and do a factory data reset? I know it sounds stupid especially after a tot but try it. Couldn't hurt
Sent from my LG-LS980 using Tapatalk

Borderline noob here, so please bear with me...
I have been using TWRP 2.7.0.0 to do all my work, and I was able to get the Lego ROM installed with ZVA. I got into too big of a hurry and forgot to make a backup of stock. I've also been unsuccessful in trying to install ZVC modem and firmware. Thankfully ZVA works as does the LEGO ROM, but I'd like to have stock there to access as well. The stockZVC that's on the Android Development page has been getting stuck (bootloop?) on the Sprint Spark logo. I've done TWRP's factory reset with no success. Any help would be great.
Thanks in advance!

Yes sir I've tried that and more to no avail is there anything I can do through adb I'm on stock recovery phone doesn't stay on long enough to install anything

sarfdawg said:
Borderline noob here, so please bear with me...
I have been using TWRP 2.7.0.0 to do all my work, and I was able to get the Lego ROM installed with ZVA. I got into too big of a hurry and forgot to make a backup of stock. I've also been unsuccessful in trying to install ZVC modem and firmware. Thankfully ZVA works as does the LEGO ROM, but I'd like to have stock there to access as well. The stockZVC that's on the Android Development page has been getting stuck (bootloop?) on the Sprint Spark logo. I've done TWRP's factory reset with no success. Any help would be great.
Thanks in advance!
Click to expand...
Click to collapse
You ever get her fixed?

[help]Qhsusb_Bulk Fix!?! VS985

I Need help fixing my g3, been Trying for hours to no avail. i need some guidance i am completely lost.

GTFODeathknight said:
I Need help fixing my g3, been Trying for hours to no avail. i need some guidance i am completely lost.
Click to expand...
Click to collapse
http://forum.xda-developers.com/lg-g3/general/unbrick-lg-g3-qhsusbbulk-qualcomm-9008-t3072091

GTFODeathknight said:
I Need help fixing my g3, been Trying for hours to no avail. i need some guidance i am completely lost.
Click to expand...
Click to collapse
First tell us what the issue is?
Is it a soft brick? Just flash your TOT file by the LG flash tool and your good to go. But first you should give us some more information

_SDroid said:
First tell us what the issue is?
Is it a soft brick? Just flash your TOT file by the LG flash tool and your good to go. But first you should give us some more information
Click to expand...
Click to collapse
(sorry for the reply time was camping) i just woke up one morning and my phone just wouldnt boot up, i cant even get to the recovery mode nor download mode. when it starts powering on i get
SECURE BOOTING ERROR
BOOT CERTIFICATION VERIFY​Along with the LEDs blinking

GTFODeathknight said:
(sorry for the reply time was camping) i just woke up one morning and my phone just wouldnt boot up, i cant even get to the recovery mode nor download mode. when it starts powering on i get
SECURE BOOTING ERROR
BOOT CERTIFICATION VERIFY​Along with the LEDs blinking
Click to expand...
Click to collapse
If you can't access the download mode you've hard bricked your phone some way. You should send it back and let it repair by someone

If you're out of warranty and feel up to taking your phone apart you could try this: http://forum.xda-developers.com/sprint-lg-g3/general/guide-fix-hard-brick-recovery-guide-t3132359
If you still have warranty, send it in.

Authorization Error #11

Hi there. I recently decided to try to root my LG G4 32 GB Cermic White VS986. It didn't end very well. I realize now after intense searches that I tried to root with an old system file, and ended up kind of bricking my phone. I am stuck in the bootloader, with the LG boot logo coming up, then a screen that says "Start Up Failed" with "Authorization Error #11" at the bottom, then the Verizon logo with the device turning back off. I have tried resetting it through Recovery Mode and trying to use LG Bridge to reset it. Not many solutions seem to be coming up. I would appreciate any help at all, as the other option would be to take it in to Verizon, and I know how steep their rates can be. Thanks! Unfortunately I am unable to post images as I am a new user, but if anyone feels they have an idea of how to fix it, please message me and I will send images.

Can you get into download mode?

Spookymyo said:
Can you get into download mode?
Click to expand...
Click to collapse
Yes I am able to.

Then you should be able to load any of the kdz files. If you were already on 13b make sure whatever kdz file you use is also 13b.

Spookymyo said:
Then you should be able to load any of the kdz files. If you were already on 13b make sure whatever kdz file you use is also 13b.
Click to expand...
Click to collapse
Thanks for the help. I did my homework after I screwed up and found how to flash the kdz back in. I also got the proper root afterwards. Thanks!

Also I apologize but could someone tell me how to close the thread? I'm really new and cant seem to find a way to ?

Boot Verification Failed

Hey all, I really have no knowledge when it comes to phones, so any help would be appreciated.
I have been trying to root my LG G3 for a few days now, but it just wont happen. I have tried PurpleDrake and ioroot and end up with the same error every time whilst the phone is restarting. As the screen is black and attempts to boot, in the top right of the screen, the message "Verification boot failed! cause- MISMATCH_SIG_LEN" and then the phone will just go to a black screen while the LED alternates blue and red. This also happens when I try to enter stock recovery. I know I have the latest ADB drivers installed and the right drivers for my phone, so that can't be it. My G3 is a D852 with SV 30b on Marshmallow, my carrier is Bell. Thanks.

HaiM80 said:
Hey all, I really have no knowledge when it comes to phones, so any help would be appreciated.
I have been trying to root my LG G3 for a few days now, but it just wont happen. I have tried PurpleDrake and ioroot and end up with the same error every time whilst the phone is restarting. As the screen is black and attempts to boot, in the top right of the screen, the message "Verification boot failed! cause- MISMATCH_SIG_LEN" and then the phone will just go to a black screen while the LED alternates blue and red. This also happens when I try to enter stock recovery. I know I have the latest ADB drivers installed and the right drivers for my phone, so that can't be it. My G3 is a D852 with SV 30b on Marshmallow, my carrier is Bell. Thanks.
Click to expand...
Click to collapse
Switch of your phone then hold volume up &connect your phone with pc by using usb cable.....
See what happen? Able to enter download mode..

Anik49 said:
Switch of your phone then hold volume up &connect your phone with pc by using usb cable.....
See what happen? Able to enter download mode..
Click to expand...
Click to collapse
Sorry for being so dumb, but could you clarify what that will do for me?

HaiM80 said:
Sorry for being so dumb, but could you clarify what that will do for me?
Click to expand...
Click to collapse
If you able to do that than you can flash your phone again.....for more clarify you have to install your phone software again to solve this issue also you cant flash v30b again right now you have to flash any other version to boot up your phone.

Anik49 said:
If you able to do that than you can flash your phone again.....for more clarify you have to install your phone software again to solve this issue also you cant flash v30b again right now you have to flash any other version to boot up your phone.
Click to expand...
Click to collapse
Ah, sorry for the confusion, but my phone starts just fine. I should have clarified in the original question that i can just hold the power button and volume down button and my phone will restart like nothing happened. Its only when root programs try to reboot into recovery and when I try to do it manually. Again, sorry about that

HaiM80 said:
Ah, sorry for the confusion, but my phone starts just fine. I should have clarified in the original question that i can just hold the power button and volume down button and my phone will restart like nothing happened. Its only when root programs try to reboot into recovery and when I try to do it manually. Again, sorry about that
Click to expand...
Click to collapse
You have working twrp....if you want root in mm you need twrp first...
---------- Post added at 01:13 AM ---------- Previous post was at 01:06 AM ----------
HaiM80 said:
Ah, sorry for the confusion, but my phone starts just fine. I should have clarified in the original question that i can just hold the power button and volume down button and my phone will restart like nothing happened. Its only when root programs try to reboot into recovery and when I try to do it manually. Again, sorry about that
Click to expand...
Click to collapse
Look here you get more info
http://forum.xda-developers.com/lg-g3/general/lg-g3-d852-telus-koodo-marshmallow-t3348286

And that's where I get confused, because when I look up how to get twrp, I am told I need root first. I have temp rooted before and used flashify to try and flash a twrp but then on reboot I would get the error.

HaiM80 said:
And that's where I get confused, because when I look up how to get twrp, I am told I need root first. I have temp rooted before and used flashify to try and flash a twrp but then on reboot I would get the error.
Click to expand...
Click to collapse
Use autorec not flashify.....but be sure you install autorec for mm version also for d852.....go to this page you will get all your file http://forum.xda-developers.com/lg-g3/development/canadian-d852-stock-bumped-rooted-rom-t3056843

Anik49 said:
Use autorec not flashify.....but be sure you install autorec for mm version also for d852.....go to this page you will get all your file http://forum.xda-developers.com/lg-g3/development/canadian-d852-stock-bumped-rooted-rom-t3056843
Click to expand...
Click to collapse
Thanks a lot for your help Anik! I can be really dumb sometimes and the fact that I can't think straight at the moment doesn't help. Seems like the main problem would be is that I was downloading Autorec of the play store, which is for lollipop. Should have seen that coming with the logo... Again, thanks!

LG G3 S D722 is hard bricked and I really need help.

My G3 is stuck on the booting screen and nothing works. I can't go to recovery menu. But I can hear my notifications, no calls though.
I tried to root my G3 using kingroot then replacing it with SuperSU. I restarted the phone after just to see if it's ok then this happened. It wouldn't start up. It just shows the "LG: life's good" thing and doesn't do anything else. I can't even go to recovery or download menu.
Now soon I am going to send it for repair. There is important stuff in my phone though such as pictures, text messages, my gmail and other accounts.
Will they be able to see it if they manage to repair my phone? a relative told me that I erased my android operating system..
Hopefully someone will help me here.

I'm no expert regarding phones with LG ROMs, but you might have had a locked bootloader. If i remember correctly, my old G2 needed its bootloader unlocked before doing any fancy stuff. I now have a G3 and i'm terrified to do anything to it. (After some nasty Soft & Hard bricks on my G2)
Can you explain better what you mean by "replacing Kingroot with SuperSU". Did you have both installed at the same time or what? Some people had problems with Kingroot that it would lose root after you reboot it (G3)
You say you can hear notifications, how can you hear them if you're not booting the OS? You said it's stuck at LG logo.

Mashed_Potatoes said:
I'm no expert regarding phones with LG ROMs, but you might have had a locked bootloader. If i remember correctly, my old G2 needed its bootloader unlocked before doing any fancy stuff. I now have a G3 and i'm terrified to do anything to it. (After some nasty Soft & Hard bricks on my G2)
Can you explain better what you mean by "replacing Kingroot with SuperSU". Did you have both installed at the same time or what? Some people had problems with Kingroot that it would lose root after you reboot it (G3)
You say you can hear notifications, how can you hear them if you're not booting the OS? You said it's stuck at LG logo.
Click to expand...
Click to collapse
Ok I managed to get to the factory reset screen by holding the power and volume down button. I confirmed it, it said "Factory reset processing" then "erasing.." with the android logo for like 2 seconds, then it disappears and goes back to the boot loop.

space_atlas said:
Ok I managed to get to the factory reset screen by holding the power and volume down button. I confirmed it, it said "Factory reset processing" then "erasing.." with the android logo for like 2 seconds, then it disappears and goes back to the boot loop.
Click to expand...
Click to collapse
Go from start -> get to download mode -> flash stock kdz and restart with the rooting and stuff

bender_007 said:
Go from start -> get to download mode -> flash stock kdz and restart with the rooting and stuff
Click to expand...
Click to collapse
I'm in download mode with the USB connected to my PC. it says "Firmware update" and has been sitting at 0% for very long.

Of course. See the guide from hyelton about getting back to stock on lg g2 and g3. Get your kdz gor d722 and flash it via lg flash tool 2014 (or use lg mobile support tool and let it do it automatically)
Sent from my SM-G930F using Tapatalk

bender_007 said:
Of course. See the guide from hyelton about getting back to stock on lg g2 and g3. Get your kdz gor d722 and flash it via lg flash tool 2014 (or use lg mobile support tool and let it do it automatically)
Sent from my SM-G930F using Tapatalk
Click to expand...
Click to collapse
I looked in this link http://storagecow.eu/index.php?dir=Xda/LG+G3/Stock/
There isn't D722 here? Sorry for all the questions..

space_atlas said:
I looked in this link http://storagecow.eu/index.php?dir=Xda/LG+G3/Stock/
There isn't D722 here? Sorry for all the questions..
Click to expand...
Click to collapse
Try this
or here you can browse

bender_007 said:
Try this
or here you can browse
Click to expand...
Click to collapse
I followed the steps and it now works! Thank you very much! I'm getting a Galaxy S6 soon

No problem
Sent from my SM-G930F using Tapatalk