Hello I have a problem with my LG optimus 4XHD. I didn't like the 4.1.2 lg skinned android so i wanted to install a custom rom. I started by rooting my phone that worked but then i flashed clockworkmod recovery without unlocking the bootloader. Now i can't enter my recovery anymore if i try to boot into it i get the message: [LG Security] Error boot image signature i dont know much about this but i can still boot into android. Now my question is: Can i still unlock the bootloader now without bricking my phone? Or is there another fix for a problem like this. Can someone please help me?
Thanks!
I tried to root my mom's LG p769 I tried installing cwm recovery with flashify with out unlocking the bootloader. I know I'm an idiot! I never had this problem before, if possible can I get the phone working without a hardreset? I neeeeed help
I have a similar problem on my p760. I followed this guide.
I got my phone succesfully updated to version V20H. Then in this post I followed the link for locked bootloader, but it re-linked me to a UNlocked bootloader guide. Now when I try to turn on the phone it says "SECURITY ERROR". I tried redo the update V20H but i got stuck at 4%. I can't go on hard reset mode. I used several guides, but they didn't work for me. Any help is appreciated. Sorry for my bad english :silly:
EDIT:
Nevermind. I went to sleep and this morning I tried this in normal flash and it worked.
Go to download mode and flash correct kdz by offline method or by official lg recovery (flash firmware which you had before unlocking). Everything should be okey
Im trying to install custom recovery into my phone but it failed, i cant restart on fastboot to flash recovery how i can do it to install custom roms please?
i rooted and unlocked the bootloader, im stuck into the recovery!!! Thanks for help friends!
Try teenybins. I've used it with my e970 in download mode when I was stuck.
http://forum.xda-developers.com/showthread.php?t=2249500
I cant boot into download mod
Thanks for reply, but i cant boot into download mod i have message : secure booting error! cause : boot certification verify
how i can fix it please help me!
Hello, today I started to having some more fun with my LG G5, I unlocked bootloader, flashed TWRP and installed SuperSU, then I started to flash firmwares. I flashed "Tizen" rom for G5, flashed nicely, everything was working and I had one more software to flash on my sd "Genisys" which I wanted to try. After flashing I was stuck on lg logo, went again to recovery, and formatted system, then again flashed this soft and after rebooting I was stuck in a recovery loop.
From here: https://forum.xda-developers.com/lg-g5/help/bootloop-twrp-t3514927 I tried the solution and my phone is showing now red triangle with "Your device is corrupt. It cannot be trusted and will not boot.
I can still get to bootloader but when i try to flash my unlock.bin again there is a "Bootloader Unlock key write fail" message.
Any help appreciated
Solved: Download mode worked so I installed V20a KDZ with LGUP.
bobiak said:
Hello, today I started to having some more fun with my LG G5, I unlocked bootloader, flashed TWRP and installed SuperSU, then I started to flash firmwares. I flashed "Tizen" rom for G5, flashed nicely, everything was working and I had one more software to flash on my sd "Genisys" which I wanted to try. After flashing I was stuck on lg logo, went again to recovery, and formatted system, then again flashed this soft and after rebooting I was stuck in a recovery loop.
From here: https://forum.xda-developers.com/lg-g5/help/bootloop-twrp-t3514927 I tried the solution and my phone is showing now red triangle with "Your device is corrupt. It cannot be trusted and will not boot.
I can still get to bootloader but when i try to flash my unlock.bin again there is a "Bootloader Unlock key write fail" message.
Any help appreciated
Solved: Download mode worked so I installed V20a KDZ with LGUP.
Click to expand...
Click to collapse
Did you try to unlock the bootloader again - after you unbricked it?
If so, did it work?
@bobiak
Congratulation to your result! Most of the guys i know, would have a unusable paperweight after those experiments.
non-toxic said:
@bobiak
Congratulation to your result! Most of the guys i know, would have a unusable paperweight after those experiments.
Click to expand...
Click to collapse
Thanks
ofirfed said:
Did you try to unlock the bootloader again - after you unbricked it?
If so, did it work?
Click to expand...
Click to collapse
When trying to solve the recovery loop (the link attached) you are moving some system files where bootloader is, so after flashing with KDZ I had bootloader locked againg, but when I got in that recovery loop again and didn't mess with moving any system files, after flashing KDZ my bootloader was still unlocked.
I didn't flash my unlock.bin to see if really bootloader is unlocked, recovery and root flashed without problem.
same problem
bobiak said:
Hello, today I started to having some more fun with my LG G5, I unlocked bootloader, flashed TWRP and installed SuperSU, then I started to flash firmwares. I flashed "Tizen" rom for G5, flashed nicely, everything was working and I had one more software to flash on my sd "Genisys" which I wanted to try. After flashing I was stuck on lg logo, went again to recovery, and formatted system, then again flashed this soft and after rebooting I was stuck in a recovery loop.
From here: https://forum.xda-developers.com/lg-g5/help/bootloop-twrp-t3514927 I tried the solution and my phone is showing now red triangle with "Your device is corrupt. It cannot be trusted and will not boot.
I can still get to bootloader but when i try to flash my unlock.bin again there is a "Bootloader Unlock key write fail" message.
Any help appreciated
Solved: Download mode worked so I installed V20a KDZ with LGUP.
Click to expand...
Click to collapse
how to fix? same here
After a few phones with flashing roms..ive come to the realization that its a waste of time..stay stock
Martin_ger said:
how to fix? same here
Click to expand...
Click to collapse
Read the last line.
Hi,
I have a rooted LG G5 H850 with an unlocked bootloader and TWRP. I was on H850 20A OPEN EU ROM from autoprime and I tried to flash H850 20D OPEN EU ROM. I booted into recovery TWRP and flashed the Zip file together with the newest SuperSU. When I tried to reboot the phone stuck in reboot - always changing between the message "Your device software cannot be checked for corruption" and the LG logo. After a long time (15 minutes or so) I pulled the battery. The same thing. Then I tried to get into recovery using the 2 hands method. I clicked through the factory reset screens (yes, yes...) - and the phone stuck between warning screen and logo again.
Could someone help me to get into TWRP again? If this would be possible I could restore my backup. Otherwise I don't what to to else...
Thanks for any helP!
Ok, after several tries with the 2 hand method, I got into TWRP again. I tried to restore my backup but it failed with an error. After that I did a full wipe (factory reset) but without the internal storage. Then I flashed the 20D zip again, after that SuperSU. Now the phone is rebooting and rebooting and rebooting. It is stuck on the LG logo and nothing else is happening. It's frustrating...
Firmware reset > flash zip file.
If that doesn't work use the LGUP or LG Bridge method to flash firmware. There should be threads in the development section
projectsome said:
Firmware reset > flash zip file.
If that doesn't work use the LGUP or LG Bridge method to flash firmware. There should be threads in the development section
Click to expand...
Click to collapse
Thanks for your help, but I don't use windows. But in the meantime I got it solved. The reason for the failure was a corrupted external sd card. Flashing from a new card did help.
i'm getting the same problem with the OREO OPEN EU ROM, booted into TWRP, flashed SuperSU and after a few loops got stuck on the LG logo. Had to pull the battery, go into download mode & reflash the ROM via LGUP. I somehow doubt it's the SD card as there were no errors on the SuperSU install.