Unlock Bootloader on P778g - LG Optimus L9 P760, P765, P768, P769

People, please help, i have a problem when i trying to unlock my bootloader, because when i trying to doing this:
"1) Flashed V10A_00 Europe Open with offline flashing method, then did a factory reset.
2) Flashed V20B_00 Europe Open with offline flashing method.
3) Left the phone connected in LG Software mode with usb debugging, wifi and signal for 20m then run "adb reboot oem-unlock"."
After the update at v10A_00 Open Europe, cant update to v20B Open Europe because the LG Mobile Support Tool, don´t recognice my cell phone at moment of flashing, it says "Phone not Connectet" How can i fix that?

Related

LG Optimus ME P350 - ROOT Problem

I have problem with my girfriends smartphone. LG P350.
1. I bought that from market, new, not branded
2. Rooted with GingerBreak
3. Everything worked fine last 4 months, then software started freezing, root access losted but app SuperUSer is still here but not working
4. I tried Factory data reset - No results, phone is fast but when install apps it's laggy.
5. I updated ROM with LG Update tool and i get T-Mobile branded OS , slower, and GingerBreak not working, just working and working but nothing happens.
I tried GingerBreak ALL VERSIONS and it's same, tried SuperOneClick, and can't get root. Tried Universal Androot, and not working. How to root it manualy? I can't install clockwork MOD recovery because no root, so i can't flash any available custom ROM. I can't remove fu****g t-mobile from OS...
Please help! Phone is now verry laggy.
New Software version:. LG-P350-V10G
Kernel: 2.6.32.9 [email protected] #3
Android version: 2.2.2
P.S. LG Update Tool, not allowing me to install any other OS. It's says, your ROM is up to date...
THANKS FOR HELP, AND SORRY FOR MY BAD ENGLISH.
i did the same thing today..updated to the newest from suite and have the t-mobile ...and cant root it...so im like u..dont know what to do..i dont know how to install the stock rom i had...i think the v10e march is the best but i cant find it and i dont know how to install it..if figure it out reply or pm me..greethings
Omg, you fuc*ed up to by LG Update? Then i think it have some new kind of protection in latest update or an bug and rooting is currently imposibble (i think) :'(
We have to wait for new version of Gingerbreak root, or any other what will support our LG P350, man pls contact me if you found something. Thanks. Greetings!!
Problem resolved
Hello. For everyone who's have this problem, i found way to fix it.
Via this way you will back to stock FW, and you will be able to get ROOT premissions again!
1. Download KDZ Updater (KDZ_FW_UPD_EN.7z)
2. Extract all files from downloaded KDZ_FW_UPD_EN.7z and run msxml.msi
3. Download and install official LG Drivers, or simply download and instal LG PC Suite, where you will get all needed drivers for your LG.
4. Download Official LG Stock ROM for your P350 (.kdz file), or as alternative use THIS Application (Original LG Firmware by crecked).
Simply type P350 as phone model and your IMEI number.
5. Open KDZ updater and chose downloaded FW from step 4.
6. Turn off the phone, pull out the battery and put it back. Now in same time press:
VOL UP + VOL DOWN + Power ON
Your should see the yellow screen with text "Emergency mode", thats mean your mobile is in emergency mode and it's ready for flashing.
7. Connect mobile with your PC via USB cable.
8. In KDZ Updater:
Type: 3GQCT
Phonemode: DIAG
Now press "Launch Software Update" button.
If all are okay, after few minutes you will se "FINISHED" at the LOG window.
If you experiencing probls with drivers, go to device manager>modem
And there disable all LG modems.
If that doesn't help reset your compuer and phone and try again.
Enjoy.
Official link of LG was die.
xZero707 said:
Hello. For everyone who's have this problem, i found way to fix it.
Via this way you will back to stock FW, and you will be able to get ROOT premissions again!
1. Download KDZ Updater (KDZ_FW_UPD_EN.7z)
2. Extract all files from downloaded KDZ_FW_UPD_EN.7z and run msxml.msi
3. Download and install official LG Drivers, or simply download and instal LG PC Suite, where you will get all needed drivers for your LG.
4. Download Official LG Stock ROM for your P350 (.kdz file), or as alternative use THIS Application (Original LG Firmware by crecked).
Simply type P350 as phone model and your IMEI number.
5. Open KDZ updater and chose downloaded FW from step 4.
6. Turn off the phone, pull out the battery and put it back. Now in same time press:
VOL UP + VOL DOWN + Power ON
Your should see the yellow screen with text "Emergency mode", thats mean your mobile is in emergency mode and it's ready for flashing.
7. Connect mobile with your PC via USB cable.
8. In KDZ Updater:
Type: 3GQCT
Phonemode: DIAG
Now press "Launch Software Update" button.
If all are okay, after few minutes you will se "FINISHED" at the LOG window.
If you experiencing probls with drivers, go to device manager>modem
And there disable all LG modems.
If that doesn't help reset your compuer and phone and try again.
Enjoy.
Click to expand...
Click to collapse
Can you upload stock rom of LG P350 to mediafire?
Official link was die.
Thank you.

[Q] Help with unbricking LGE720

Hey folks,
its bricked due to FOTA (I think it stands for: firmware over the air) update. This means the phone downloads a firmware update without computer connection or further PC-Software. Alas it didn't work.
Situation:
Phone starts, displays LG Logo and after that an 'updating firmware' screen for about 1 sec before rebooting and doing it all over again.
What I tried to solve this:
set up a new Win 7 32 bit machine to try to unbrick it. (drivers didn't work correctly on 64 bit) at least the MCCI driver update didn't)
connected the phone with the PC in Emergency Mode (holding VOL_UP + VOL_DOWN + PWR while USB is connected)
downloaded B2CApp (LGSupport Tool) and installed the device drivers for Emergency mode.
disabled the Android(Modem) dirver
downloaded V10D_00.kdz from LG home page
using the phones IMEI and this link:
http://csmg.lgmobile.com:9002/csmg/b2c/client/auth_model_check2.jsp?esn=IMEI_NUMBER_GOES_HERE
This gave me this link
http://csmgdl.lgmobile.com/swdata/WDLSW/LGE720/ADEUBK/V10d_00/V10D_00.kdz
I'm German so this seems all right, but I'm no expert​
installed msxml
ran KDZ_FW_UPD_EN and tried CDMA in CS_EMERGENCY Mode
A bunch of magic happend until the phone restarts during the process and is right back where we started, if I put it back to Emergency Mode while KDZ_FW_UPD_EN is still running the process finishes, but to no avail.
The log of this try is attached.
Where I am stuck now:
phone:
runs in Emergency Mode
is recognized by KDZ_FW_UPD_EN as well es LG Support Tool
Flashing via KDZ_FW_UPD_EN finishes
Flashing yields no result.
What else did I try
download V10C_00.kdz, as well as V10A_00.kdz from LG site and tried those with same result as with V10D_00.kdz
tried 3GQCT Type instead of CDMA
Wild guesses by me:
I need a different KDZ_FW_UPD_EN version, maybe different dll. I got it from here somewhre in a LG P500 related topic.
I messed up the driver install or need a different driver
LG hates me personally and planted this whole brick specifically to get to me.
The device really is permanently bricked, so I did all I could and there is nothing more to do? That would be sad, I hope I'm wrong here.
Additional Info:
The phone is not rooted and has never before been flashed. It ran with the same stock firmware since it was unwrapped.
The phone was not interrupted by power-loss during FOTA update.
The [read phone information] tool from KDZ_FW_UDP_EN crashes every time, maybe this tells somebody where things go wrong
Any help is appreciated. Ask for more info, if you need it.
Update - What else did I try:
I got the LG Support Tool to flash the Emergency Recovery all by itself runs till 99% --> reboots --> still stuck in same ol' bootloop
reentering Emergency Mode from the bootloop makes the Emergency Recovery finish with 100%, no error, but still bricked.
Regards
gimmeg

LG L5 ii e450 'Security error' Solution here!!

Like many others i recently got trapped into 'Security Error' problem and phone was refusing to boot-up.(after root i deleted some system apps )
luckily i found the solution
this guide should work for other LG's phone too.
so here are the steps:
1. update/install USB Driver for windows
2. now enter into "download/emergency mode" of your phone... but how??
(i) remove battery then insert battery
(ii) press and hold both vol+ and vol- buttons and connect to computer via data cable. you will see LG logo and '>download mode' on bottom of mobile screen.you will also hear a 'connecting sound' from PC that indicates that your phone is now connected.
3. disconnect the phone from PC(remove data cable) and install LG MOBILE SUPPORT TOOL
4. run that B2CAppSetup file, it will install LG SUPPORT TOOL online so wait for some minutes.
5. now in main window of LG MOBILE SUPPORT TOOL you will see "waiting for connection".
View attachment 2934639
6. connect your phone to PC (via data cable)
7.LG TOOL now should try to connect your phone to it, so wait for few seconds.
View attachment 2934640
8. now in LG TOOL got to 'OPTIONS' > 'UPGRADE RECOVERY'
View attachment 2934641
View attachment 2934642
9. make your self a cup of coffee or take a nap if your internet connection is too slow because it will download approx.500-600 MB of software and automatically install it on your phone.
(if your upgrading stuck at 4% then disconnect the phone and connect it again in 'download mode')
View attachment 2934643
10. Dance
there is a another method too using kdz but that didn't work for me Flashing KDZ on LG L5 II
PIECE OF ADVICE: never ever try to delete any system app of Stock Rom otherwise you will get 'Security error' (not even after unlocking bootloader) and let me know if there is any solution to it.
tested guides by me on LG L5 ii e450 on win8.1:-
-for rooting [Guide] Root LG Optimus L5 II E450
-for CWM recovery (L5 II) CWM for Locked Bootloader(Beta 2)
-for unlocking bootloader (L5 II) Unlocked Bootloader (Optima Team)
Actually I've done it with locked bootloader and it's still working as a charm.
JerryGoyal said:
Like many others i recently got trapped into 'Security Error' problem and phone was refusing to boot-up.(after root i deleted some system apps )
luckily i found the solution
this guide should work for other LG's phone too.
so here are the steps:
1. update/install USB Driver for windows
2. now enter into "download/emergency mode" of your phone... but how??
(i) remove battery then insert battery
(ii) press and hold both vol+ and vol- buttons and connect to computer via data cable. you will see LG logo and '>download mode' on bottom of mobile screen.you will also hear a 'connecting sound' from PC that indicates that your phone is now connected.
3. disconnect the phone from PC(remove data cable) and install LG MOBILE SUPPORT TOOL
4. run that B2CAppSetup file, it will install LG SUPPORT TOOL online so wait for some minutes.
5. now in main window of LG MOBILE SUPPORT TOOL you will see "waiting for connection".
View attachment 2934639
6. connect your phone to PC (via data cable)
7.LG TOOL now should try to connect your phone to it, so wait for few seconds.
View attachment 2934640
8. now in LG TOOL got to 'OPTIONS' > 'UPGRADE RECOVERY'
View attachment 2934641
View attachment 2934642
9. make your self a cup of coffee or take a nap if your internet connection is too slow because it will download approx.500-600 MB of software and automatically install it on your phone.
(if your upgrading stuck at 4% then disconnect the phone and connect it again in 'download mode')
View attachment 2934643
10. Dance
there is a another method too using kdz but that didn't work for me Flashing KDZ on LG L5 II
PIECE OF ADVICE: never ever try to delete any system app of Stock Rom otherwise you will get 'Security error' (not even after unlocking bootloader) and let me know if there is any solution to it.
tested guides by me on LG L5 ii e450 on win8.1:-
-for rooting [Guide] Root LG Optimus L5 II E450
-for CWM recovery (L5 II) CWM for Locked Bootloader(Beta 2)
-for unlocking bootloader (L5 II) Unlocked Bootloader (Optima Team)
Click to expand...
Click to collapse
getting stuck at 4%
Beershake said:
Actually I've done it with locked bootloader and it's still working as a charm.
Click to expand...
Click to collapse
how?in stock rom?
Thanks jerry goyal :fingers-crossed:
LG-E460 "security error" problem
My phone (LG E460) got stuck into bootloop with "security error" error. I tried multiple times flash a .kdz file via LG Mobile Suppor Tool, but it gets stuck on 5% of installation process. Any thoughts how I can repair this issue?
Jerry at the installation of lg mobile support its showing me popup of mfc100.dll is missing can you pls help with that
I got stuck with the first step. Couldn't see the menu. It keeps buzzing and the black screen stays. help
JerryGoyal said:
Like many others i recently got trapped into 'Security Error' problem and phone was refusing to boot-up.(after root i deleted some system apps )
[/URL]
Click to expand...
Click to collapse
I did everything as shown but im still stuck. When i turn device one lg logo shows up, after a few seconds it spins around and i can hear boot sound, and lights turn on. I left it like that for about an hour but its still stuck.
device: LG e460
Thinking myself to flash orginal recovery. Atm thinking about booting into recovery via minimal adb in usb debug mode
Reason: i fail to boot into cwm since month with my e440. Recovery reboot wiget never worked also expeliced xposed model for this LG4ii has no boot into recovery option.
minimal adb code something like
adb devices #enter
adb reboot bootloader #enter
fastboot devices #enter insteat of fastboot may recovery or download
#in fastboot mode you can flash files by
fastboot flash recovery recovery.img #enter flash recovery.img
Click to expand...
Click to collapse
It seems the program just doesn't want to find the phone. I don't think it had Usb debugging enabled(Think that's the problem), cause its not my phone, but I have also tried changing usb ports, from usb2 to usb3 and restarted the phone. Any ideas?
It's great! Everything worked out without "stucking on 4%". The "security error" appeared on LG E450 after "rooting" and deleting some system apps.
Many thanks to author.

relock bootloader and may be unbrick (lg p765 v20c india)

Accidently I relock bootloader and may be unbrick (lg p765 v20c india) (need to confirm and reedit by devs)
I have lg p765 with unlocked bootloader (checked by software upgrade mode shows unlocked bootloader and installed recovery also flashed 2-3 roams priviously)
i follow this thread to root and unlock bootloader http://forum.xda-developers.com/showthread.php?t=2778839
after 3-4 month I flash new cwm recovery 6.0.4.8 no-touch from this thread http://forum.xda-developers.com/showthread.php?t=2733471
Recovery & phone works great but when I go to recovery by power option (gravity box xposed installer ) (usually I use this option and it works ) and it do not go to recovery but stuck at lg logo and do not boot (i don’t know culprit of this either gravity box or recovery or may be something else) try to restart by removing battery but it didn’t worked (I haven’t try pressing power button for 10 second and restart because at that time I don’t know this ) try many method hard reset by pressing combination of button but still not work and I think my phone gets bricked now what to do??
Now I follow [GUIDE] [UNBRICK][ROOT] FLASH Any LG L9 Factory ROM (kdz) WITH OFFLINE FIX
Link http://forum.xda-developers.com/showthread.php?t=2085344
My phone goes to software upgrade mode this is my benefit (by pressing volume up key and inserting usb cable while phone is switched off) but problem is as I have previously installed or u can say flashed jb 4.1.2 so phone must be on and then go to software upgrade mode by software only so flashing process stops at 14% or may be driver not get installed as in adb also my phone didn’t show up
I search many thread and download fastboot.zip from this thread http://forum.xda-developers.com/showthread.php?t=2292828
• Extract fastboot archive somewhere like C:\fastboot follow readme.txt file
• I use option 1 fastboot I clear cache or something like this (actually I experiment many things but didn’t work and command I use also don’t know right now as I searched many thread ) after that try option no 6 p760 flash jb xloader and uboot but not worked. don’t try.
• Then I use option 3 p765 ics xloader uboot
• After that i try to hard reset but security error (before that I know it sows security error but I still try)
• And this time [GUIDE] [UNBRICK][ROOT] FLASH Any LG L9 Factory ROM (kdz) WITH OFFLINE FIX works and to my surprise bootloader is locked and factory reset.
Yes, flashing the xloader and uboot seems to relock the device, you will need to re-unlock it ( Sorry). Although you did say you got the phone to start?

[Q] Can't unlock bootloader lg l9 P789g

Hello i've tried to unlock my phone bootloader on my lg l9 768g but no one of the guides i used worked for me.
I can do every steps right, but when i use "Adb reboot oem-unlock" command my phone reboots but does not show the bootloader screen instead starts normally.
Drivers are fine, firmware flashing fine(v10a to v20b open europe both, also tried flashing original firmware before these two)
pc recognizes my phone. :/
Im trying in a windows 7 x64
hi here is a post that could help you..
forum.xda-developers.com/showthread.php?t=2500269
cheers
KeiFTW said:
Hello i've tried to unlock my phone bootloader on my lg l9 768g but no one of the guides i used worked for me.
I can do every steps right, but when i use "Adb reboot oem-unlock" command my phone reboots but does not show the bootloader screen instead starts normally.
Drivers are fine, firmware flashing fine(v10a to v20b open europe both, also tried flashing original firmware before these two)
pc recognizes my phone. :/
Im trying in a windows 7 x64
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Click to collapse

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