Database Users

Secure boot error after reverting to KitKat via TWRP backup

Hey everybody! Please, I need urgent help!
So, yesterday, I upgraded my G2 D802 from rooted stock KitKat to the official European Lollipop, v30b. Before that, I made a TWRP backup of everything.
So, I rooted Lollipop, installed TWRP, and was about to install the new Xposed for Lollipop. Then, **** started freaking out and "LGSmartCover" kept crashing continuously, making it virtually impossible to navigate the UI.
Soooooo, I decided to revert back to KitKat via the TWRP backup.
Everything SEEMED fine, but now I cannot boot. I get the LG logo, then this message appears:
ERROR : boot certification verify
[800]_______________________
[850]
[900] Secure booting Error!
[950] Cause : boot certification verify
[1010]
[1060]_________________________
Click to expand...
Click to collapse
I do not seem to be able to enter download mode or recovery either.
My computer does recognise it as "qhsusb_bulk" when plugged in, though.
What do? I'll be eternally grateful if somebody can help me solve this.
UPDATE: I somehow managed to get into this "Hardware key control mode" by pressing and holding all three hardware buttons at once, while plugging the phone into the computer.
UPDATE2: Somehow, I managed to boot into Download mode, after doing the same thing over and over again! Trying to recover via LGMobileSupportTool now..
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same error
How did you solve it ?

Hi,
I had a similar problem and I managed to repair the phone by using the TOT method with LG FlashTool v1.8 by reaching download mode.
Good luck!

If you can fully enter download mode(first screen and then the second screen),then try to flash a stock rom with LG Flashtool(KDZ method) or TOT method.
Since you were using TWRP,official LG Update tools will kill your phone if you try to flash the stock rom with them.

i have the same problem and i dont know how to reach download mode. when i connect my phome to the pc, it shows the same secure boot error. any help?

davvmaulana said:
i have the same problem and i dont know how to reach download mode. when i connect my phome to the pc, it shows the same secure boot error. any help?
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Click to collapse
Supposing the drivers are installed in windows, you need to have the phone plugged in to comp. and then hold volume-up+power until you get the "download mode" on your phone's screen

leeco le 3 elite x722 stuck in boot loop, please help!

Hello to all who read this.
My phone only shows this two modes but does not get into recovery mode at all, it only shows the first step and then it reboots form the start:
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I can't get into TWRP, even if I flash a new recovery with fastboot and run the boot command.
That said I can open fastboot mode and qfil mode.
The problem occurred last night I was watching youtube and in the morning the battery on the phone was fully drained and I couldn't boot into the lineageOS 16 that I'm using (had for 1 month).
The LED light in the top right corner is never lightning up, only when is fully drained then it shows the battery is empty and some blinking red light on the LED.
Well I tried :
- to install/run TWRP it couldn't let me run it
- to qfil the stock ROM and it did let me flash it but it was the same when I pressed the power button after the flashing process
- to use the "update" command in fastboot mode to update the stock ROM on to the phone and it said:
error: update package 'update.zip' has no android-info.txt
Does anyone know how to solve this?
Please help me!
All best,
Jasmin

I had the same issue with X727. Your battery is faulty and needs to be replaced. I got mine from this guy and received an original LeEco battery albeit with 2016 manufacturing date but it works well and phone does not reboot anymore.

nwaves said:
I had the same issue with X727. Your battery is faulty and needs to be replaced. I got mine from this guy and received an original LeEco battery albeit with 2016 manufacturing date but it works well and phone does not reboot anymore.
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Okey, thanks for the replay.

Hi, Jasmin slayer!
Did that Work for you to replace the battery? If not, try to flash some bootloader and verify , If twrp Boots again after flashing. Remember you need twrp 3.3.1 for Andro Pie!

LupusC said:
Hi, Jasmin slayer!
Did that Work for you to replace the battery? If not, try to flash some bootloader and verify , If twrp Boots again after flashing. Remember you need twrp 3.3.1 for Andro Pie!
Click to expand...
Click to collapse
I have the same problem my Le pro 3 x720 device. It is in a boot loop. I wonder if changing the battery will work.

Issues returning to stock

Howdy everyone...
OnePlus 7t Pro McLaren edition (International Edition **NOT T-MOBILE**)
Model: HD1913
Current Software Build: Oxygen OS 10.0.5.HD01AA (OTA update when I first unboxed).
I am having issues trying to return to stock. I rooted the phone with a combination of a couple guides found here (https://forum.xda-developers.com/7t-pro/how-to/10-0-3-patched-boot-image-oneplus-7t-pro-t3986351 and . I noticed after doing that I was missing the stock Oxygen apps and my build information was missing data. Not a huge deal, but I need to wipe the phone and start from scratch anyway, for other reasons. I decided to go back to stock if I have to redo everything anywhere.
First thing I tried, I got the stock firmwares (https://forum.xda-developers.com/7t-pro/how-to/oneplus-7t-pro-repo-oxygen-os-builds-t4003455). And this is where my issues started. My software build is weird... I have the HD1913, however my software build is HD01AA. Per that post, I should have HD01BA. I grabbed both of them for giggles, put them on my storage and booted into TWRP. Tried to flash the HD01AA (since that was what I have now), and it failed. Tried the other one, same issue. I'm getting a bunch of errors while trying to mount the system ("System unable to mount: invalid argument").
Second thing I tried, was to use the built in software update that OnePlus says to use (through the system update). It wouldn't install them (surprise).
Third attempt... Using the MsmDownloadTool (https://forum.xda-developers.com/7t-pro/how-to/op7tpro-unbrick-tool-to-restore-device-t4002909) I downloaded both versions cause I don't know which to use, and followed the instructions to get the phone into the mode. Turn the phone off, hold the vol up button and plug the cable in (very simple). It shows up connected in the software. Exactly 5 seconds later, the phone reboots and boots normally... I repeat this process aprox. 2.3 million more times. It does not matter what USB-C cable I use, the port on my computer, or how long I hold the buttons. The phone will boot into the download mode (or whatever it's called) show up as connected in MsmDownload and then reboot.
The phone works. I am still able to boot it up.... All I want to do is get this phone back to stock. I don't HAVE to, but now that it's fighting me, I have to beat it...
imgur.com/a/KhBGwao
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Okay - After sacrificing an iPhone to the Android God, I got it.
Instead of using the button combination to get into EDL Mode, I found an article that gave an adb command (adb reboot edl) to get to it. It did not reboot this time, and I was able to flash HD01BA to it, which matches what the phone should have...

so i destroyed my 6t for good.

so i took some break from android for couple of years and it seems somethings have changed since then, i had oneplusone so rooting wasn't new to me, but i got my oneplus 6t rooted it straightaway i had some issues with TWRP not sticking after i flash and had some issues were i couldn't find the directory to install roms but all that was fixed, had some other isues with using my banking app but that was sorted a swell so i was having fun.
a mouth or so ago i was wanting to get rom and my TWRP wasn't there it kept rebooting into fastboot menu, so i tried to flash TWRP again and it wasn't working so i messed up with boot img with all sorts of command lines related to flashing boot img, now my phone is dead for good i don't see how it can be fixed when the boot is corrupted i cant even boot into fastboot.
when i tired to boot into fastboot it wont work it stuck in that unlocked bootloader screen i have tried every combination available and it reboots into that. please help if you can.
please if i didn't explain my self properly ask away i just forgot what i did it been a while.
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Try MSM tool

As mentioned, neither Fastboot or recovery need to work for the MSMTool to work.
Volume Up + Power while turning on will boot to fastboot.
Volume Down + Power while turn on will boot to recovery.
Holding Volume Up + Power should force the phone to turn off.
Volume Up + Volume Down should put your phone in Download mode for the MSM Tool.
Note the screen wont do anything, the phone will just be recognized by the MSMTool.

Dafelleant said:
Try MSM tool
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Click to collapse
you guys have no idea how great full i am its finally working from dead phone in the storage to daily driver.. again you can always rely on xda members.

Yeah, OnePlus is one of the only phones that is truly un-brickable. Even Google pixels do not have working MSM tool.

[HELP] Bricked PX5 HZC, can't open recovery.

Hey y'all. I tried updating my PX5 (I had the latest HZC mcu installed) 6.0.1 to android 8.0 using this guide
After booting into recovery, I tried to select the update.img file through the SD card but nothing happened.
After nearly giving up, I decided to try the same thing using USB drive. I was able to select the img file, they screen showed a few lines of text and just instantly turned off.
I tried to boot it, enter recovery mode or what not but nothing happened.
If I hold the RST button for 10s~ the non-phsyical side buttons blink for 5s, but nothing happens. I was not able to return back to the recovery mode.
Is there anything to do to solve this? My PX5 has 1 USB slot and 1 TF slot. I assume it does not have GPS sd slot so that's why the file could not be read, and either I had a corrupted file on my USB drive or it's just impossible to do through USB and it bricked my device.
I would appreciate any help with solving this brick, It was a mistake trying to upgrade from the first place..
If there is nothing to do, i'll just go and buy a new head unit, I wanted to upgrade because it lacked some features and the UI was very simple and outdated.
I don't have a photo of the MCU, but i had the MTCE_HZC_2.94b installed from here: https://disk.yandex.ru/d/umCvHqCDzHccr
I also downloaded the update files from here, following the guide above.
Before updating the MCU, I had the MTCE_HZC_2.74 installed by stock. The MCU update worked well, the android upgrade failed utterly.
Now the unit won't turn on at all and there is a black screen. long pressing the RST button until the side buttons blink does not boot the device into recovery. seems like even recovery got corrupted somehow.
After some research, I found out that I can use OTG cable to flash the firmware and recovery using a PC.
Will I be able to flash android 8-10 directly instead of flashing the android 6? or I'd have to flash directly android 6?
If so, where can I get the frimware/img file i'll need to flash?
EDIT:
I tried to connect the system to a laptop using USB A to A cable but the rockchip tool did not recognize it..
any other ways or the unit is lost?
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