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error: Boot certification verify

how in hell can i solve the problem "error: Boot certification verify"
i can not go into recovery, download or anything, i searched so much but i didnt find an answer for the lg g2. pls help me :crying:

can anybody help me pls? nothing works for me :crying:

hansi25 said:
can anybody help me pls? nothing works for me :crying:
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Click to collapse
I have the same problem.

same problem
hansi25 said:
can anybody help me pls? nothing works for me :crying:
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Click to collapse
i am having the same to problem for a sprint optimus g however if plugged to laptop press volume up dwn and pwr at same time my phone goes into download mode but will not load drivers

HELP!!! - Bad TWRP Flash
Has anyone solved this?

I have the same issue
I ended up sending the phone to lg and they wanted 350.00!!!!! to fix it!!!! i told them to send my phone back. not idea what to do yet once i get it but hopefully someone will come up w a solution. i cant even get mine into download mode or recovery

hansi25 said:
how in hell can i solve the problem "error: Boot certification verify"
i can not go into recovery, download or anything, i searched so much but i didnt find an answer for the lg g2. pls help me :crying:
Click to expand...
Click to collapse
Here is the solution.
http://forum.xda-developers.com/showthread.php?t=2582142

Do you have an option that DOESNT require ubuntu to install it?

me to in the same boat, The thing is I have download mode but gets stuck at 49%, I need the TOT file for D802G Think this is EE / Three. does anyone know if kdz can be converted to TOT "worth a try"

same problem
i have the same problem ...did you find it?

Just did this to my phone just a few moments ago as well :/ anyone have any luck with windows?

giorgos13 said:
i have the same problem ...did you find it?
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I don't know if you managed to find the solution to this, but for anyone else out there that hasn't, just download the AutoRec app. Fixes it in seconds and flashes TWRP Recovery.

need help
jacobdavidson96 said:
I don't know if you managed to find the solution to this, but for anyone else out there that hasn't, just download the AutoRec app. Fixes it in seconds and flashes TWRP Recovery.
Click to expand...
Click to collapse
my LG G2 F320L just got this issue.
what do you mean download the AutoRec app? its just stuck at LG logo then the error will show up. then just blank screen.
please help.

mm2_02 said:
my LG G2 F320L just got this issue.
what do you mean download the AutoRec app? its just stuck at LG logo then the error will show up. then just blank screen.
please help.
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Click to collapse
It's a bootloader issue, for me it was. If you can enter recovery, flash JB Bootloader or KK Bootloader, whatever your rom needs. it worked for me.

Autorec
hansi25 said:
how in hell can i solve the problem "error: Boot certification verify"
i can not go into recovery, download or anything, i searched so much but i didnt find an answer for the lg g2. pls help me :crying:
Click to expand...
Click to collapse
Hey man, if youre able to boot into your rom, try this,
AutoRec
http://forum.xda-developers.com/showthread.php?t=2715496
It sorts of reflashes your boot recovery to TWRP, works for me when i got the same error.

jacobdavidson96 said:
I don't know if you managed to find the solution to this, but for anyone else out there that hasn't, just download the AutoRec app. Fixes it in seconds and flashes TWRP Recovery.
Click to expand...
Click to collapse
Thanks for this. I just ended up back on a (brand new, mind you) G2. I've had SO many problems with rooting, recovery, download mode, etc... I have TWRP installed, stock ROM and somehow ended up getting the secure boot error only when entering download mode. My phone was booting, recovery was working, etc - just download mode seemed toasted. AutoRec fixed it - so, thanks for posting this!

I had the same issue, if some of you want to know how I fixed it these steps might help you too...
What you need is :
Any versoin of stock kdz. I used 11a. GET FROM HERE
LG Universal drivers. Get them here
If you have verizon get your driver here
KDZ Flash tool. GET IT HERE
1- Power off your phone completely ... remove battery etc...
2- Plug the UsB cable to your phone and your computer.
3- Hold down volume up and power button and enter in the download mode
4- If you in download mode you can now flash any KDZ file using the method in one of the guide above or find it using google.
after flashing you will have the stock rom installed. I was on 4.2 and for some reason i was not able to root with "ioroot" until i updated to 4.4!
so make sure you are on 4.4 to do the root
later you can install any recovery. I installed autorec.apk and then booted into recovery and flashed latest version of twrp
thats about it.... but don't install MIUI that rom is stupid

hansi25 said:
how in hell can i solve the problem "error: Boot certification verify"
i can not go into recovery, download or anything, i searched so much but i didnt find an answer for the lg g2. pls help me :crying:
Click to expand...
Click to collapse
have you try vol down + power button ( LG Logo ) then Hold Vol down + Power ? till you get to factory reset ! and power key again will take you back to recovery

WOW! Thank You soooooooooooooo much! I flashed a cloudyg3 backup from VK Rom and got this error but this method worked!

Just download AutoRec and choose to flash TWRP. Worked for me.

[Q] Sprint LG G2 (LS980) Stuck in Bootloop

Well it's been a while since I broke a phone, so here I am!.... again
LS980. TWRP Rooted. Failed CM. Now stuck in boot loop.
I'm running Windows 7 64bit. I have latest LG drivers. Phone can boot into recovery but nothing else. I cannot boot into LG's "Download Mode". I can get into the "Hard Recovery Mode" which doesn't work anyway (Vol Up + Power). From recovery I can select to wipe cash and data and I can select to install from sdcard (no cards on this thing) or from ADB. When selecting ADB and trying to sideload stuff to it, it tries to load but always fails. If I try to push stuff it always comes back :closed
I cannot access any form of Fastboot. All i can do is let is loop or enter recovery. Since it seems to be the only thing I can access, can someone please assist me in what I should be trying to sideload that might get me a step further? I cannot fastboot so anything there isn't an option. Seemingly all I can try to do is sideload something. What... I'm not really sure. And no :crying: I don't have a backup.
Please help!

Dagroth said:
Well it's been a while since I broke a phone, so here I am!.... again
LS980. TWRP Rooted. Failed CM. Now stuck in boot loop.
I'm running Windows 7 64bit. I have latest LG drivers. Phone can boot into recovery but nothing else. I cannot boot into LG's "Download Mode". I can get into the "Hard Recovery Mode" which doesn't work anyway (Vol Up + Power). From recovery I can select to wipe cash and data and I can select to install from sdcard (no cards on this thing) or from ADB. When selecting ADB and trying to sideload stuff to it, it tries to load but always fails. If I try to push stuff it always comes back :closed
I cannot access any form of Fastboot. All i can do is let is loop or enter recovery. Since it seems to be the only thing I can access, can someone please assist me in what I should be trying to sideload that might get me a step further? I cannot fastboot so anything there isn't an option. Seemingly all I can try to do is sideload something. What... I'm not really sure. And no :crying: I don't have a backup.
Please help!
Click to expand...
Click to collapse
I am on verizon. Had this happen to me once. Are you SURE you are hitting the buttons at the right time for download? I have never heard of this failing..on any phone. I would almost bet it's accessible and you aren't hitting it in time..maybe? Good luck!

Still no luck

still looping
Dagroth said:
Still no luck
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do you have the LG mobile support tool? If so we can use it to get past this, I did it once recently on my G2. If you still need assistance just say so..

geosnipe said:
do you have the LG mobile support tool? If so we can use it to get past this, I did it once recently on my G2. If you still need assistance just say so..
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Click to collapse
I have the exact same issue....I have even used LGFlash tool and I still get the bootloop....it's almost like I my EFS is missing?...my SPC is "null", no MDN, MIN, nothing...PLEASE help....I haven't had a phone in over a week!:crying:
I failed to mention it boots to FTM Mode, shuts down, reboots....repeatedly

Hey so when you try adb sideload it starts up then fails? Have you tried just pushing to recovery with adb also? Universal drivers? Sorry for all the questions just trying to help

cmhphotog said:
I am on verizon. Had this happen to me once. Are you SURE you are hitting the buttons at the right time for download? I have never heard of this failing..on any phone. I would almost bet it's accessible and you aren't hitting it in time..maybe? Good luck!
Click to expand...
Click to collapse
You were right, I was doing it wrong. Once I got into download mode it went easy.
Response to others, I found that if I held vol down by itself long enough, the phone would stop bootlooping and shut off. I could then properly go into download mode.
Thanks for the help

still need help
amphillips82277 said:
I have the exact same issue....I have even used LGFlash tool and I still get the bootloop....it's almost like I my EFS is missing?...my SPC is "null", no MDN, MIN, nothing...PLEASE help....I haven't had a phone in over a week!:crying:
I failed to mention it boots to FTM Mode, shuts down, reboots....repeatedly
Click to expand...
Click to collapse
1. Hold the power button until the device is OFF.
2. Download LG drivers to the PC (LG VZW_United_WHQL_v2.11.1) and LG mobile support tool (B2CAppSetup).
3. Install these packages.
4. Plug in you USB cable into the phone but not the computer.
5. Hold volume up and insert the USB cable to the PC- the phone should boot to 'download mode'.
6. Open the support tool and click Options>Upgrade Recovery, follow the prompts.
7. At the first prompt indentify your phone using IMEI/ESN, then click OK
8. Let it do its thing, the phone will reboot and most likely have a bunch of error messages and some FC's. Just hit okay to all messages, the phone will settle after 2 minutes or so.
9. Download freegee from market and reflash recovery of your choice.
10. Make sure you have a ROM saved to the SD to flash
11. Use freegee to reboot to recovery
12. Once in recovery you can reflash the ROM as normal.
13. Reboot and Profit!
*$* Or you could go back to Stock and start fresh!
*$* BEFORE ANY FLASH ALWAYS STOP and MAKE A NANDROID BACKUP!
Good Luck and if you get stuck let me know

Similar issue
I'm stuck in bootloop, no custom recovery or root. All data has been deleted. I have tried the LG support tool, but it locks up. It also tells me my device is a test model, something bad has happened. I can get into download mode but can't flash stock, via the flash tool. It says wrong device, and at the download screen where my phone says rooted it says the model is a D802! Somehow this info got jacked up! I can almost make it through the D802 flash but it fails also. I only did that to confirm my suspicion that the phone thinks its a different model. I'm open to anything, I've tried it all.

amphillips82277 said:
I have the exact same issue....I have even used LGFlash tool and I still get the bootloop....it's almost like I my EFS is missing?...my SPC is "null", no MDN, MIN, nothing...PLEASE help....I haven't had a phone in over a week!:crying:
I failed to mention it boots to FTM Mode, shuts down, reboots....repeatedly
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Click to collapse
that's what mine did even the tech at the sprint store couldn't fix it they replaced it with this ☟
Sent from my SM-N900P using XDA Premium 4 mobile app

fatboypup said:
that's what mine did even the tech at the sprint store couldn't fix it they replaced it with this ☟
Sent from my SM-N900P using XDA Premium 4 mobile app
Click to expand...
Click to collapse
I think that's my only option. The Note? That's quite the trade off. One last question, did you say rooted at the download screen even though it wasn't?

geosnipe said:
do you have the LG mobile support tool? If so we can use it to get past this, I did it once recently on my G2. If you still need assistance just say so..
Click to expand...
Click to collapse
How? My phone only boots to download or stock recovery. What mode does the phone need to be in for the tool to work? I can get the process started but the tool locks up every time.

jseibert81 said:
I think that's my only option. The Note? That's quite the trade off. One last question, did you say rooted at the download screen even though it wasn't?
Click to expand...
Click to collapse
it still said rooted ... I told the tech straight up it was my fault and mentioned I wished I had gotten the n3 and he said it was on the list as an approved replacement I was stoked
Sent from my SM-N900P using XDA Premium 4 mobile app

Dagroth said:
You were right, I was doing it wrong. Once I got into download mode it went easy.
Response to others, I found that if I held vol down by itself long enough, the phone would stop bootlooping and shut off. I could then properly go into download mode.
Thanks for the help
Click to expand...
Click to collapse
Awesome. Glad to help.

cmhphotog said:
Awesome. Glad to help.
Click to expand...
Click to collapse
How was this resolved?

[Q] [Q} Is my D802 Bricked?

Hi all
my D802 can't reboot with following method, could you please help me investigate how to fix it?
1. Can't enter download mode: I power it off, then hold volume up and plug in USB, but only the first screen shows up, can't enter the second one:
http://i.imgur.com/Kc4egAZ.jpg
http://i.imgur.com/jdCWBEW.jpg
So I can't flash kdz image.
2.I am able to access TWRP with official factory default( power+volume down to power on, when LG logo shows up, release power and volume down, then hold power.). But no matter I flash CloudyFlex which in my sdcard, or sideload flash others ROM, the cell phone will no boot up, always stuck at LG logo.
Any possible way to fix? Thank you very much.

helleon said:
Hi all
my D802 can't reboot with following method, could you please help me investigate how to fix it?
1. Can't enter download mode: I power it off, then hold volume up and plug in USB, but only the first screen shows up, can't enter the second one:
http://i.imgur.com/Kc4egAZ.jpg
http://i.imgur.com/jdCWBEW.jpg
So I can't flash kdz image.
2.I am able to access TWRP with official factory default( power+volume down to power on, when LG logo shows up, release power and volume down, then hold power.). But no matter I flash CloudyFlex which in my sdcard, or sideload flash others ROM, the cell phone will no boot up, always stuck at LG logo.
Any possible way to fix? Thank you very much.
Click to expand...
Click to collapse
What did you do prior to this happening? We need a story.

CuraeL said:
What did you do prior to this happening? We need a story.
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Click to collapse
not sure, I did few stupid things before.
1. I flashed LG G Pro 2 ROM here: http://forum.xda-developers.com/showthread.php?t=2673143 but it not good for me, so i went to recovery. but this rom replaced my recovery to a unknow one, not TWRP. when I was in this unknow recovery, my phone linked with PC via USB. PC found a lot of unformatted drivers, I did the most stupid thing: formatted one of them.
2. G Pro2 rom still can boot up, I flashed stock kdz, and rooted it with ioroot10, then flashed TWRP 2.6.3.3.
3. copy CloudyFlex_1.4.zip into sdcard through MTP mode of stock rom. reboot into recovery TWRP, flash cloudyflex, phone never boot up again.
4. No matter what rom i flash, always stuck at LG logo and the phone become hot.
sorry for my pool English.

helleon said:
not sure, I did few stupid things before.
1. I flashed LG G Pro 2 ROM here: http://forum.xda-developers.com/showthread.php?t=2673143 but it not good for me, so i went to recovery. but this rom replaced my recovery to a unknow one, not TWRP. when I was in this unknow recovery, my phone linked with PC via USB. PC found a lot of unformatted drivers, I did the most stupid thing: formatted one of them.
2. G Pro2 rom still can boot up, I flashed stock kdz, and rooted it with ioroot10, then flashed TWRP 2.6.3.3.
3. copy CloudyFlex_1.4.zip into sdcard through MTP mode of stock rom. reboot into recovery TWRP, flash cloudyflex, phone never boot up again.
4. No matter what rom i flash, always stuck at LG logo and the phone become hot.
sorry for my pool English.
Click to expand...
Click to collapse
Sorry man, I have no idea what you may have formatted then.. :/
I can't think of anything right now.. If you can't get to download mode and flash stock kdz again.. Then I don't know. I hope some one comes along that knows something. Sounds serious. I'll keep on thinking about things. But I have to leave the house now so..
Sorry.

CuraeL said:
Sorry man, I have no idea what you may have formatted then.. :/
I can't think of anything right now.. If you can't get to download mode and flash stock kdz again.. Then I don't know. I hope some one comes along that knows something. Sounds serious. I'll keep on thinking about things. But I have to leave the house now so..
Sorry.
Click to expand...
Click to collapse
thx mate. Just wondering why can't get to download mode. After formatted a driver, flash stock kdz successfully and the stock rom work pretty well.

did you fix the problem, i have almost the same issue, my phone gos into first download mode screen, but not the second one, so noway to flash a kdz, help us please.

[Q] Entering Download mode while stuck in a bootloop

Hello,
this could be a silly question, but I'm actually hopeless about it...
I've been using CloudyG3 for 3 days, but I had some problems about it, so I decided I'd revert back to stock. I entered the Download Mode, installed the V20D ROM using LG's Support Tool, and, when the phone restarted, tried to enter the Factory Reset screen. Try as I might, I couldn't do that, so I'm stuck in a bootloop (I mean, the LED indicator is flashing, but no LG boot animation - just the static logo. I think there could've been some problem while flashing the FW, that's why I would like to enter Download mode again, or maybe at least turn my phone off (it can only restart). Nevertheless, while trying to flash the FW again while in a bootloop, everything from model no. to firmware version installed is shown correctly, but it can't boot into Download mode.
Thanks in advance!

a5943 said:
Hello,
this could be a silly question, but I'm actually hopeless about it...
I've been using CloudyG3 for 3 days, but I had some problems about it, so I decided I'd revert back to stock. I entered the Download Mode, installed the V20D ROM using LG's Support Tool, and, when the phone restarted, tried to enter the Factory Reset screen. Try as I might, I couldn't do that, so I'm stuck in a bootloop (I mean, the LED indicator is flashing, but no LG boot animation - just the static logo. I think there could've been some problem while flashing the FW, that's why I would like to enter Download mode again, or maybe at least turn my phone off (it can only restart). Nevertheless, while trying to flash the FW again while in a bootloop, everything from model no. to firmware version installed is shown correctly, but it can't boot into Download mode.
Thanks in advance!
Click to expand...
Click to collapse
Have you got a power source connected ?

timlad said:
Have you got a power source connected ?
Click to expand...
Click to collapse
Thanks for your reply!
No, I don't.
EDIT
I'm really grateful to you for your suggestion. Having plugged the device in, the Download mode came up with no problems. Now I'm trying to flash the previous version - V20B, which might make my device usable again.
Thank you very much!

[Q] Pretty sure my LG G2 is bricked...Permanantly.....

So Verizon just released their 25B update. I did not want to accept it, as I was rooted and I have a custom recovery. When I was unlocking the screen I accidentally pressed install. It said shutting down, so I held down the power button and shut it down before It went to "update" When I turned the phone back on, I went into recovery and restored and rebooted. I got to the LG logo and it booted me into TWRP. So I then tried another restore point and it did the same thing. Any thing I can do?

Maybe try factory wipe in TWRP? and see the device will boot normally?

ayong chia said:
Maybe try factory wipe in TWRP? and see the device will boot normally?
Click to expand...
Click to collapse
That is other thing I tried after the restores didn't work

Zach_Deem said:
That is other thing I tried after the restores didn't work
Click to expand...
Click to collapse
We should be able to get this fixed.
Do you ave access to a windows PC ? If so You could enter Download mode and flash the stock TOT file or KDZ file for your phone.
Since your in ubuntu , could you check if the Phone enumerates as a Disk drive ? If so Can you check as what device it shows up ?
EG /dev/sdb or sdc or sdd . Once you have that Could you run this command and output what it says ?
gdisk -l /dev/sdX (Replace X with the actual character that the phone shows up as).
:good:

I'm sorry. I forgot to say no download mode either. I still have my LG flash tool from a soft brick before.im not that good at explaining things that's why I accidentally left it out

Zach_Deem said:
I'm sorry. I forgot to say no download mode either. I still have my LG flash tool from a soft brick before.im not that good at explaining things that's why I accidentally left it out
Click to expand...
Click to collapse
If you have access to twrp I think this is what you need.

I had no idea about that. Thank you so much. But I just got finished with Verizon and they are sending me a new phone