URGENT | I messed up.... - LG Optimus 4X HD

So I was trying to unlock my bootloader for the LG Optimus 4X HD. It didnt work,it showed me something called ERROR:SIGNATURE INVALID
AND LIKE 5 SECONDS AFTER POWER SAVING whenever i booted in into recovery.So being the idiot I was,I thought a factory reset would do the trick but,now it made it worse.I cant use recover firmware from the LG Recovery Program
and when my phone boots up it shows the ERROR:SIGNATURE INVALID AND 5 SECONDS AFTER POWER SAVING again.Im from singapore if that helps.Hope someone can find me a solution to fix my phone first,and then unlock the bootloader.
BTW:when i tried unlocking the boot loader i typed adb reboot oem-unlock and it just reboots and goes into charging.

Try to reflash with the lg flash tool. Search it here and you will find it

Related

Brick my lg

Hi, i try to install a custom recovery but my phone now doesnt power on.
when i try to enter in the recovery it gives me errors that say in red in top of the screen
error boot image signature
5 seconds after power is turned off for batery saving
and when i try to power on my phonr it stay with the lg logo and dont start the phone
can anyone please help me
sker100 said:
Hi, i try to install a custom recovery but my phone now doesnt power on.
when i try to enter in the recovery it gives me errors that say in red in top of the screen
error boot image signature
5 seconds after power is turned off for batery saving
and when i try to power on my phonr it stay with the lg logo and dont start the phone
can anyone please help me
Click to expand...
Click to collapse
Hi,
This should help you restore your phone to working state:
http://forum.xda-developers.com/showthread.php?t=2179126
i already have seen some tutorials where butt my problem is connect the phone with pc, when i press the power and volume down the lg gives-me the error i said and the phone turn off, so i don't know how to connect the phone with the computer ...
just downloand open europe v20a flash it with kdz flasher remove battery put usb cable while holding the volume down after you mast have install lg drivers run kdz flasher slect the kdz and press flash put the battery back and leave the phone the program will freeze is normal dont afraid and after when the phone open unlock your booltader first root it and after downloand rom manager and flash recovery through this app but is not touch recovery is normal recovery
Can't this be solveed by simply reflshing recovery?
The phone gets into s/w mode so just type from terminal
-> fastboot flash recovery "recovery.img"(change with name of img file in this case)
Obviously try with a recovery different from the one you already tried with

[Q] P880 hangs at boot | No S/W update available

Hello,
After rooting my p880, my phone hangs at boot. Just after the boot sound (*pling* ) the phone is hanging. The boot image is still moving.
Things I tried already:
I followed this thread http://forum.xda-developers.com/showthread.php?t=2069723, which tells to do a kdz update. This is not working, as I am not able to get to the S/W upgrade screen. Instead, when I start the phone using the power button + volume down, i get the Android system recovery menu (3e).
I tried to upload a new (cyanogenmod) rom using adb sideload, but that didn't work, as the file I used was damaged (I will retry with new file).
I also did a factory reset and a cache wipe.
Can someone tell me what is best to do?
Kind regards
X-cal
x-calibur1978 said:
Hello,
After rooting my p880, my phone hangs at boot. Just after the boot sound (*pling* ) the phone is hanging. The boot image is still moving.
Things I tried already:
I followed this thread http://forum.xda-developers.com/showthread.php?t=2069723, which tells to do a kdz update. This is not working, as I am not able to get to the S/W upgrade screen. Instead, when I start the phone using the power button + volume down, i get the Android system recovery menu (3e).
I tried to upload a new (cyanogenmod) rom using adb sideload, but that didn't work, as the file I used was damaged (I will retry with new file).
I also did a factory reset and a cache wipe.
Can someone tell me what is best to do?
Kind regards
X-cal
Click to expand...
Click to collapse
you're entering s/w mode wrong. dont press power button. just hold vol down and plug in usb
OOOhhhh noooosss....... That's kind of stupid .
Thanks!

Cannot enter recovery, download mode, or boot after Verizon OTA

Good Evening,
I mistakenly accepted the OTA update from Verizon yesterday, after putting it off. My phone is rooted, and shows the 'boot certification verify' error when attempting to go into Recovery or boot the phone. Every time I shut my phone off and turn it on I get to the LG Logo with the aforementioned error.
I am not new to flashing, and have searched the forum and found threads on flashing back to the stock ROM and recovery. I have downloaded the *.kdz file, VZW LG Drivers, and the LG Flash Tool. The ONLY thing that is holding me back is getting my phone to boot into download mode. It seems to bypass the method when I press and hold the Volume up (+) button and insert the USB cable. It jumps straight to the LG Logo with the 'boot certification verify' error.
Does anyone have any input? Thank you for your time in read this.
-Crunch

Big problem with my lg l90 d405n

hello, I tried to unlock my bootloader because I was going to install orionlp rom but after flashing custom recovery my device turned black.
I tried to put my phone on but it didn't work...
I tried this guide to unbrick my phone http://forum.xda-developers.com/showpost.php?p=61808443 but when I try to put my phone in downloader mode nothing happens when I press the top vol button before puttingit in the usb. Normally there should be an image that shows you are a downloader;
Can someone pls help me???:crying::crying::crying::crying:

Infinite bootloop Huawei P10

Recently i'm just update the Huawei android version, but after restarted the phone, it's keep stuck on the manufacturer logo, unable boot into the main screen.
I did try to press Volume key + and Power unfortunately unable to enter the recovery mode, please help.
Send it to service
If you haven't unlocked the bootloader/installed TWRP/Rooted, then yes I'd agree with the above comment and send to service.
Otherwise follow the instructions here.... https://forum.xda-developers.com/p10/help/tutorial-recovering-p10-p10-brick-t3600211
amonev said:
Send it to service
Click to expand...
Click to collapse
I'd asked the service center but they said will wipe my data, is there anyway to retrieve the data back?
Just for understanding: Did you unlock your Bootloader?
Jannomag said:
Just for understanding: Did you unlock your Bootloader?
Click to expand...
Click to collapse
No, i didnt unlock bootloader.
Did someone managed to fix that? I have same problem.
I used hisuite to install pie update on my p10 and it started bootlooping.
Button combinations for fastboot, factory reset etc dont work, cant even shut down phone unless disconecting battery from the motherboard.
i have the same problem, i didn't do anything it just happened and now i don't know what do, please help
sayfsami said:
i have the same problem, i didn't do anything it just happened and now i don't know what do, please help
Click to expand...
Click to collapse
Have you tried to do Factory Reset and/or (re)Install latest firmware and recovery from eRecovery (switch off, conncect to charger, keep pressing Vol+ and then boot by Pow)
zgfg said:
Have you tried to do Factory Reset and/or (re)Install latest firmware and recovery from eRecovery (switch off, conncect to charger, keep pressing Vol+ and then boot by Pow)
Click to expand...
Click to collapse
i can't access recovery mode, the phone keeps boot looping until the battery is drained, i tried to access recovery mode with the boutons combination to do a factory reset but i can't access it, it doesn't work, the phone stays stuck in the boot loop, i actually don't know how to install the firmware i didn't find it.
once the phone has some power it starts booting and rebooting until the battery is drained, when i plug it it starts booting and rebooting on it's own.
sayfsami said:
i can't access recovery mode, the phone keeps boot looping until the battery is drained, i tried to access recovery mode with the boutons combination to do a factory reset but i can't access it, it doesn't work, the phone stays stuck in the boot loop, i actually don't know how to install the firmware i didn't find it.
once the phone has some power it starts booting and rebooting until the battery is drained, when i plug it it starts booting and rebooting on it's own.
Click to expand...
Click to collapse
eRecovery is different from Recovery (I wrote above the phone to be connected to charger while booting with Vol+ kept pressing; in Recovery there is no option for Installing the latest - but the option is present in eRecovery), but anyway, you probably cannot boot to eRecovery either ;(
It could be also possible to reinstall firmware from HiSuite but you could not connect if you cannot boot
For flashing from Fastboot, you must have Bootloader and FRP unlocked (but to unlock, you must first boot to the system)- if I understood correctly, you didn't play with Bootloader, Fastboot, flashing, etc yet, hence your FRP and BL are locked
Uhm can anyone help me? pls. I unlocked my bootloader and flashed open kirin AEX P1 Beta and it caused me bootloop maybe because I fail to factory reset the second time or at least can I reflash the custom rom to make it work again but I can't access my p10 on fastboot

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