[Guide]Unlock Bootloader Full Guide Start To Finish(P769) - LG Optimus L9 P760, P765, P768, P769

(Update)
Go Here
http://forum.xda-developers.com/showthread.php?p=43770474

I'll be using this once those files are up. I already have root and CWM recovery from this thread, will it be okay for me to use this guide without reverting anything?

nullvader said:
I'll be using this once those files are up. I already have root and CWM recovery from this thread, will it be okay for me to use this guide without reverting anything?
Click to expand...
Click to collapse
What do you mean without reverting anything?

How is this different then the other guides? Not noticing any new steps here for unlocking
Sent from my SGH-I777 using xda premium

carloswii5 said:
What do you mean without reverting anything?
Click to expand...
Click to collapse
Would I be able to use this guide with my L9 as is (with root and CWM recovery already)?

nullvader said:
Would I be able to use this guide with my L9 as is (with root and CWM recovery already)?
Click to expand...
Click to collapse
Yea why wouldnt you be?

psychoace said:
How is this different then the other guides? Not noticing any new steps here for unlocking
Sent from my SGH-I777 using xda premium
Click to expand...
Click to collapse
I dont know if you read the Title
Unlock Bootloader Full Guide Start To Finish
Click to expand...
Click to collapse

Something here doesn't make any sense, I can't find a mirror for V20B anywhere.. does this mean I'm stuck with a locked bootloader or is there another alternative?

leolawliet said:
Something here doesn't make any sense, I can't find a mirror for V20B anywhere.. does this mean I'm stuck with a locked bootloader or is there another alternative?
Click to expand...
Click to collapse
You will find it in this thread http://forum.xda-developers.com/showthread.php?p=41388372
Look for the drop box link in the first post.
Or check out this other guide lol
It has the official kdz link.
http://forum.xda-developers.com/showthread.php?p=39333298
Sent from my LGMS769 using xda app-developers app

Just a quick question,
I live in an area with no signal and I use wifi calling for text/wifi. Do I have to have signal during the 30 minute wait to be prompted after I run the commands and reboot?

leolawliet said:
Something here doesn't make any sense, I can't find a mirror for V20B anywhere.. does this mean I'm stuck with a locked bootloader or is there another alternative?
Click to expand...
Click to collapse
I couldn't upload it via drop box keeps getting error... Know some other place to upload?

hufger said:
Just a quick question,
I live in an area with no signal and I use wifi calling for text/wifi. Do I have to have signal during the 30 minute wait to be prompted after I run the commands and reboot?
Click to expand...
Click to collapse
Unfortunately yes

hufger said:
Just a quick question,
I live in an area with no signal and I use wifi calling for text/wifi. Do I have to have signal during the 30 minute wait to be prompted after I run the commands and reboot?
Click to expand...
Click to collapse
It might work, if I remember correctly, some have done it with no signal only wifi, I would leave it on longer than 30 mins though.
Sent from my LGMS769 using xda app-developers app

kuma82 said:
It might work, if I remember correctly, some have done it with no signal only wifi, I would leave it on longer than 30 mins though.
Sent from my LGMS769 using xda app-developers app
Click to expand...
Click to collapse
Nope needs signal
Sent From My Deodexed V21B

So I got my bootloader unlocked but unfortunately during the second flashing process the up test program froze and errored out, now my phone isnt recognized in adb devices and will only go into s/w upgrade mode.
Edit: I also tried fastboot and was able to sucessfuly get into fasboot but flashing the stock x-loader and u-boot was unsucessful and fastboot just gave me the "waiting on device" message.
Edit 2: So after quite the night of running through your guide and a couple of hard ships, I have to say this a very well written guide and it would have worked the first try if I had been doing too much multitasking while in the second flash process.
Overall was easy to follow and I got through after having failed attempts with others guide before due to oem unlock command not working after waiting.
Also I highly reccomend anyone who is going to try this to at least give the other tutorials on unlocking the bootloader for the p769 a solid read through. It will make a difference in what you understand and dont.
Lots of props and I look forward to seeing what you do for our phone in the future!

the flashing tool crashes on me every time I try to read phone information

halomademeapc said:
the flashing tool crashes on me every time I try to read phone information
Click to expand...
Click to collapse
Dont read phone info. Just upgrade start at that point.
Sent from my LG-P769 using xda premium

hufger said:
So I got my bootloader unlocked but unfortunately during the second flashing process the up test program froze and errored out, now my phone isnt recognized in adb devices and will only go into s/w upgrade mode.
Edit: I also tried fastboot and was able to sucessfuly get into fasboot but flashing the stock x-loader and u-boot was unsucessful and fastboot just gave me the "waiting on device" message.
Edit 2: So after quite the night of running through your guide and a couple of hard ships, I have to say this a very well written guide and it would have worked the first try if I had been doing too much multitasking while in the second flash process.
Overall was easy to follow and I got through after having failed attempts with others guide before due to oem unlock command not working after waiting.
Also I highly reccomend anyone who is going to try this to at least give the other tutorials on unlocking the bootloader for the p769 a solid read through. It will make a difference in what you understand and dont.
Lots of props and I look forward to seeing what you do for our phone in the future!
Click to expand...
Click to collapse
Thanks for the positive feedback mate i really appreciate it and as of right now im working on a porting a MIUI ROM but i havent had time so i havent worked on it for almost 2 weeks but its at the point where its about to boot just a couple of more mods

V20b europe open file missing?!
carloswii5 said:
I couldn't upload it via drop box keeps getting error... Know some other place to upload?
Click to expand...
Click to collapse
I cant seem to location the V20B Europe Open KDZ either. Looks like LG updated to V20C for it.... anyone know of a working link to the v20b kdz??
---------- Post added at 06:58 PM ---------- Previous post was at 06:33 PM ----------
EDIT: I have located it, It is Here, second link in first post: https://docs.google.com/file/d/0B059sYrh0T19UWluVjVWaGJpTFU/edit?usp=sharing This include a few other files include the v20bkdz

confused abotu superuser part.....
So carlos it looks like i was having the same issue as you that you posted in another unlocking bootloader thread, cant get past the adb oem-unlock. It just keeps doing a normal reboot.
I saw you got it to work with the wifi connection, is that confirmed needed for every attempt?
also in your guide you have the following command: Go to the Superuser App and update the binary the normal way
I dont know what that means , could you explain that part a little better. Thanks

Related

Flashing back to p769 stock after trying to unlock bootloader

Hey Guys. I tried to unlock my bootloader by flashing p760 euro. I cant get to unlock but now i have given up. How can i flash back to p769 stock firmware and fix the wonky touch screen and reversed image. I have flashed several phones in the past but this one just doesnt want to work for me. Thanks very much in advance.
zironia said:
Hey Guys. I tried to unlock my bootloader by flashing p760 euro. I cant get to unlock but now i have given up. How can i flash back to p769 stock firmware and fix the wonky touch screen and reversed image. I have flashed several phones in the past but this one just doesnt want to work for me. Thanks very much in advance.
Click to expand...
Click to collapse
Use the offline kdz method to get back on 10G rooted. Search for lelus' screen fix and apply.
Basically follow links here http://forum.xda-developers.com/showthread.php?t=2198114
Skip the flashing offline kdz of euro 20b, do the rest.
p769 wonky mirror touch screen
zironia said:
Hey Guys. I tried to unlock my bootloader by flashing p760 euro. I cant get to unlock but now i have given up. How can i flash back to p769 stock firmware and fix the wonky touch screen and reversed image. I have flashed several phones in the past but this one just doesnt want to work for me. Thanks very much in advance.
Click to expand...
Click to collapse
I Have the same problem I tried unlocking my boot loader but when i got to do this step on the lelus method: adb reboot oem-unlock.....the phone reboots normally and i dont see a prompt to unlock the bootloader i waited more than a half a hour more than 3 times. NOW i am stuck with the mirror touch screen. now my phone is nothing please help.../! or is there any way i could fix this or fix the mirror screen ...please i will really appreciated.
This process is just ridiculous. Really, LG....what is the point in making this all mission impossible! Ugh! :banghead:
Sent from my LG-P769 using XDA Premium 4 mobile app
You can also use Smartflashtool and just pick the .fls file. Works without any problem Way faster and easier
N00BY0815 said:
You can also use Smartflashtool and just pick the .fls file. Works without any problem Way faster and easier
Click to expand...
Click to collapse
Can you elaborate on this? I've tried to use the Smartflashtool to fix this problem and haven't had any luck.
Havent used it in a long time, but in fact you only need smartflashtool (sft), the fls file you extacted from the kdz file and that's basically it. Reboot your phone in download mode and open sft. In there change to the correct tab, choose your fls (dont remember which field, since it is REALLY long ago) hit start and it should update your baseband.
N00BY0815 said:
Havent used it in a long time, but in fact you only need smartflashtool (sft), the fls file you extacted from the kdz file and that's basically it. Reboot your phone in download mode and open sft. In there change to the correct tab, choose your fls (dont remember which field, since it is REALLY long ago) hit start and it should update your baseband.
Click to expand...
Click to collapse
Great idea but how do you get past the magic number does not match issue? If you have the model.dll file for the p769 could you please forward so I can replace the one I have. Mine is for the 940
Sent from my LG-P769 using xda-developers app. 'tis the season to give thanks so push the button already!
Like I said, I only inserted the fls file and there was no magic number error.
Maybe check the p970 forum, there is another version of SFT. Maybe it was this one, that worked.
Well that would be great if we could get that to work for our phone because it take like three minutes to flash. This would be an alternate to the offline flash.
P769v20h- 'tis the season to give thanks so push the button already!
Ok again:
It works to flash the BASEBAND ONLY!
It does NOT and I repeat N O T work for the full firmware.
For this to work we would need a new modell.dll, which we probably can only get from LG itself, or a REALLY good reverse engineer here on the forum. But I really doubt anyone wants to do this. I was also talking to xonar_ and he is like an android god to me. He confirmed, that it's very hard, up to impossible to get this to work. I also tested a pack made by him, but it also wouldnt work. If anyone is interested, go ahead an contact him. He is a really nice guy and explains everything very much in detail, if you nicely ask for
Sent from my LG-P760 using xda app-developers app
N00BY0815 said:
Ok again:
It works to flash the BASEBAND ONLY!
It does NOT and I repeat N O T work for the full firmware.
For this to work we would need a new modell.dll, which we probably can only get from LG itself, or a REALLY good reverse engineer here on the forum. But I really doubt anyone wants to do this. I was also talking to xonar_ and he is like an android god to me. He confirmed, that it's very hard, up to impossible to get this to work. I also tested a pack made by him, but it also wouldnt work. If anyone is interested, go ahead an contact him. He is a really nice guy and explains everything very much in detail, if you nicely ask for
Sent from my LG-P760 using xda app-developers app
Click to expand...
Click to collapse
Maybe you and I are not talking about the same thing. I'm talking about the SmartFlash Tool that is in this post. I don't know what you are talking about.
Fixed my touch screen on LG P769
I am now able to fix my wonky touch screen finally. Thank God.
After spending the whole day Saturday to unlock the bootloader and install custom rom, I finally gave up after 24 hours. Next I wanted my phone to be in working condition by Sunday night.
I just flashed the stock kdz (V20h) for t-mobile usa. I had this one originally. My display was okay (after initial switch off and on) but touch was still not good.
After that I just did root my phone and installed Super Su. as mentioned in other threads
Then followed the command to cat v6.bin into some firmware file, as mentioned in other threads. It feels so good to get the touch screen working again.
The display is still mirrored when phone boots, but first time i switch off the screen and on again, and it's fixed.
I will edit this post, later with more details and links later.
Also, I did a Factory Data reset, after flashing v20h kdz. But I believe it was not required. In fact, it was very difficult to enter passwords for wifi, google play account etc with the wonky touch screen.
Sounds like you got it under control. Here is a zip file Kuma made that I use when I try to unlock bootloader. Sometimes I have to install it twice but it's the fastest way to get back to normal
https://mega.co.nz/#!SA8ijQ4K!ZbPwmAZIV4rrNod0TY8mGiyB8Rc4iGcOkVzDmS4TdMM
LG-P769V20H 'tis the season to give thanks so hit the button already!
Nathan.7118391 said:
Sounds like you got it under control. Here is a zip file Kuma made that I use when I try to unlock bootloader. Sometimes I have to install it twice but it's the fastest way to get back to normal
LG-P769V20H 'tis the season to give thanks so hit the button already!
Click to expand...
Click to collapse
So, how do you use this zip to fix ur touch screen? How do u install it if you don't have cwm recovery installed.
Thanks.
Sent from my LG-P769 using xda app-developers app
desi.techiee said:
So, how do you use this zip to fix ur touch screen? How do u install it if you don't have cwm recovery installed.
Thanks.
Sent from my LG-P769 using xda app-developers app
Click to expand...
Click to collapse
Work through the wonky screen and install artas182x cwm recovery for locked bootloaders (it's a 2nd init recovery) & Robert busybox.
I have both apps on my themed rom for locked bootloaders http://forum.xda-developers.com/showthread.php?p=46151882
Sent from my LGMS769 using XDA Premium 4 mobile app

(Guide) Unlock Bootloader First Try (P769)

Ok so a spark bursted in my head at 2 in the morning of an idea and it has worked so im noticed that alot of people struggle to unlock the bootloader but not because the steps are hard but there is one missing part i have found which is it needs to have a signal connection to you provider for it to work and the thing is when you flash V20B the radio is different so it sometimes might get the signal but that is like what 1/100 or something like that haha ok back on track my idea was what if i install the radio for the P769 which was extracted for the workaround that we had for the JB manual install via CWM on V20B and we would a working radio so the bootloader would unlock on first try and i tried it and it worked muahahaha ok so what to do
Well before you go flash V20B to make everything easier make sure this app is already installed on your phone
Artas Bootstrap Recovery Installer and make sure you have the radio zip on your sd card
Then make sure you have debuging on and show touches on also so everything is easier
Now flashing set up first go download the JB guide its in the root l9 offline method and download the bin for V20B ok so now flashing run the rootl9 bat file but for JB then start the flashing process and were going to swap the bin then after swapping let it do its thing
ok after it finishes go to supersu install the binary and after that go to artas bootstrap recovery and install it then boot to the recovery after in recovery flash the radio zip and let it install it takes a while maybe a min to 2 minutes and after it installed reboot and then you should see you have signal hoorah , now just let it sit for 30-40 minutes then after the time is up run the command "adb reboot oem-unlock" from your computer and it should take you to the acept to unlock it and just press volume up and tada you have unlocked bootloader on first try
Sorry For No Links but in a Hurrry Good luck
carloswii5 said:
Ok so a spark bursted in my head at 2 in the morning of an idea and it has worked so im noticed that alot of people struggle to unlock the bootloader but not because the steps are hard but there is one missing part i have found which is it needs to have a signal connection to you provider for it to work and the thing is when you flash V20B the radio is different so it sometimes might get the signal but that is like what 1/100 or something like that haha ok back on track my idea was what if i install the radio for the P769 which was extracted for the workaround that we had for the JB manual install via CWM on V20B and we would a working radio so the bootloader would unlock on first try and i tried it and it worked muahahaha ok so what to do
Well before you go flash V20B to make everything easier make sure this app is already installed on your phone
Artas Bootstrap Recovery Installer and make sure you have the radio zip on your sd card
Then make sure you have debuging on and show touches on also so everything is easier
Now flashing set up first go download the JB guide its in the root l9 offline method and download the bin for V20B ok so now flashing run the rootl9 bat file but for JB then start the flashing process and were going to swap the bin then after swapping let it do its thing
ok after it finishes go to supersu install the binary and after that go to artas bootstrap recovery and install it then boot to the recovery after in recovery flash the radio zip and let it install it takes a while maybe a min to 2 minutes and after it installed reboot and then you should see you have signal hoorah , now just let it sit for 30-40 minutes then after the time is up run the command "adb reboot oem-unlock" from your computer and it should take you to the acept to unlock it and just press volume up and tada you have unlocked bootloader on first try
Sorry For No Links but in a Hurrry Good luck
Click to expand...
Click to collapse
Lol, I think this post needs some editing, but thank you for the help and support. Perhaps when you get some rest you'd be able to re-write the guide with bullet points and links.
http://forum.xda-developers.com/showthread.php?t=1995220
is this atrix recovery compatible? i couldn't find anything on artas
t.d said:
...Perhaps when you get some rest you'd be able to re-write the guide with bullet points and links.
Click to expand...
Click to collapse
...and punctuation.
t.d said:
Lol, I think this post needs some editing, but thank you for the help and support. Perhaps when you get some rest you'd be able to re-write the guide with bullet points and links.
http://forum.xda-developers.com/showthread.php?t=1995220
is this atrix recovery compatible? i couldn't find anything on artas
Click to expand...
Click to collapse
I wouldn't recommend it just use artas bootstrap recovery and what do u mean "couldn't find anything on artas"
Sent From My P769 Running RC5
My phone is IMEI blacklisted and I try it before via WiFi but never got unlocked. Is a most to have a T-Mobile sim card to be able to unlock?
I can not find this app Artas Bootstrap Recovery Installer search all over since you posted this fix. Could you link me to it.
xxtra_strength said:
I can not find this app Artas Bootstrap Recovery Installer search all over since you posted this fix. Could you link me to it.
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=2095825
Slackys said:
My phone is IMEI blacklisted and I try it before via WiFi but never got unlocked. Is a most to have a T-Mobile sim card to be able to unlock?
Click to expand...
Click to collapse
Yes it is a must but it does not matter if the sim card has service or not
Sent from my LG-P769 using Tapatalk 4 Beta
carloswii5 said:
Yes it is a must but it does not matter if the sim card has service or not
Sent from my LG-P769 using Tapatalk 4 Beta
Click to expand...
Click to collapse
Well I have it unlocked with a Net10 sim card... so I need a T-Mobile simcard just to unlock the bootloader? Can use a simple mobile one?
I have no signal on my P768 on V20B how can I fix this?
Slackys said:
Well I have it unlocked with a Net10 sim card... so I need a T-Mobile simcard just to unlock the bootloader? Can use a simple mobile one?
Click to expand...
Click to collapse
Try it with the net 10 sim
Sent from my LG-P769 using Tapatalk 4 Beta
viktorfk said:
I have no signal on my P768 on V20B how can I fix this?
Click to expand...
Click to collapse
What do u mean ?
Sent from my LG-P769 using Tapatalk 4 Beta
I meant no signal from my provider... but I solved it, doing a Hard Reset, I'm sitting here waiting the 30-40 minutes, so I can enter the command, I'll tell if it works, it should work now, hopefully, if you were right and you do need signal from your provider to unlock the bootloader.
carloswii5 said:
Try it with the net 10 sim
Sent from my LG-P769 using Tapatalk 4 Beta
Click to expand...
Click to collapse
I tried before but only reboots with no unlock.
It didn't work on my P768 even if I have signal from my provider, I even checked the H+ on my phone before trying to unlock it, it just reboots normally.
Slackys said:
I tried before but only reboots with no unlock.
Click to expand...
Click to collapse
Then it must be a tmobile sim mmmm.....
Ok, I hate being hand held, but I have a question. Fm my understanding these are the steps I should be doing to unlock BL and Rooting the Sweet LG L9 P769 below:
1. First flash the V20B_00.KDZ Process.
2. Next Unlock the BL
3. Then Root the device Process.
4. Install recovery cwm, and the RC5.
Please let me know it this is correct, and add anything that i should lookout for.
When I start this process I'll make sure to take Note to write a first grader process.
I love this device for the price i pay for it, and i love a challenge.
My future device will be a LG optimus G Pro, but until then I need to get the LG L9 P769 hacked.
xxtra_strength said:
Ok, I hate being hand held, but I have a question. Fm my understanding these are the steps I should be doing to unlock BL and Rooting the Sweet LG L9 P769 below:
1. First flash the V20B_00.KDZ Process.
2. Next Unlock the BL
3. Then Root the device Process.
4. Install recovery cwm, and the RC5.
Please let me know it this is correct, and add anything that i should lookout for.
When I start this process I'll make sure to take Note to write a first grader process.
I love this device for the price i pay for it, and i love a challenge.
My future device will be a LG optimus G Pro, but until then I need to get the LG L9 P769 hacked.
Click to expand...
Click to collapse
I recommend you also do what i posted here because if not holy dam its gunna take you a long or you might not even get it (;
Sent From My Xperia Themed P769
carloswii5 said:
I recommend you also do what i posted here because if not holy dam its gunna take you a long or you might not even get it (;
Sent From My Xperia Themed P769
Click to expand...
Click to collapse
Yes, I will i have it printed out, and ready. Now I'm just getting all the required files.
Thks Carloswii5
Thread closed at OP's request.

[Q] p769 - bootloader - fastboot - stumped

UPDATE: http://forum.xda-developers.com/showthread.php?t=2461483
this thread can be closed.
i don't know how any one is getting any of this done. i've been able to root, several times, install CWM, several times, but i can not seem to figure out how to boot into the fastboot, or into the bootloader so that i can use fastboot, so that i can unlock my bootloader. is there some magical secret that every one else in the world knows, except me???
i'm running v20d. i've got fastboot and adb installed on linux (debian), and i can shell into the phone via adb, and then substitute user* as root and delete bloat ware and every thing else - but i can't figure out how to boot into bootloader... i've tried "adb reboot bootloader" and "adb reboot-bootloader" (yes, the 2nd one is valid), but both just reboot the phone, then i see the CWM flashing lights, then it continues to boot as normal - a few times i got the dead droid icon.
i can do all this http://forum.xda-developers.com/showthread.php?p=43401184 but i can't get into the danged bootloader... this can't be just me, but it seems like i'm the only one that has no clue how to get this right
bleh! thanks in advance.
* "su -" does not stand for superuser - that's a misgnomer, and since most of the mobile hackers are windows users, they never know that little detail - and you should include the dash after su, so that the shell assumes the root user's home directory and reads the root user's .bashrc env vars, etc
LG prevents rebooting in bootloader on most phones, including this one. Entering fast boot with the script and running the command fails BC its not an official fastboot its user compiled.
Sent from my LG-P769 using xda app-developers app
i've been rooting and putting CWM onto it before i bother with the bootloader, but i wonder if you have to unlock the bootloader FIRST, because CWM or rooting wipes out some thing that's needed to get the bootloader to allow fastboot??? i dunno, just taking stabs in the dark now...
I didn't have recovery or radio installed when I unlocked my bootloader
leolawliet said:
I didn't have recovery or radio installed when I unlocked my bootloader
Click to expand...
Click to collapse
that might be the "1 little detail" i've been missing - i'm going to try to convert mine back to stock, without windows...
sentientsystem said:
that might be the "1 little detail" i've been missing - i'm going to try to convert mine back to stock, without windows...
Click to expand...
Click to collapse
Dude, check my last post on the unlocking bootloader guide thread, I think step 13 that I posted might be the missing key,if it is please let me know because I haven't seen anyone try this at all.
leolawliet said:
Dude, check my last post on the unlocking bootloader guide thread, I think step 13 that I posted might be the missing key,if it is please let me know because I haven't seen anyone try this at all.
Click to expand...
Click to collapse
yeah, that was one of the other things i was going to keep in mind (i actually had seen it as soon as you posted it, and thought you might be correct on that detail).
sentientsystem said:
yeah, that was one of the other things i was going to keep in mind (i actually had seen it as soon as you posted it, and thought you might be correct on that detail).
Click to expand...
Click to collapse
*crosses fingers* good luck, if I find more suggestions I'll let you know. For now let's hope I'm right on this.
You're not the only one. I am also unable to unlock. I agree with omgbossis21 when he mentions that LG blocked access to fastboot. I tried several key combinations but none worked.
The bootloader is on this thing, though. The hidden menu shows the status. Has anyone tried asking LG tech support how to access official fastboot? It must exist in order for the techs to recover the damn thing.
Sent from my LG-P769 using XDA Premium 4 mobile app
peanut butter jelly time! http://forum.xda-developers.com/showthread.php?p=43401184 - now that it's unlocked, i don't know what to do next
sentientsystem said:
peanut butter jelly time! http://forum.xda-developers.com/showthread.php?p=43401184 - now that it's unlocked, i don't know what to do next
Click to expand...
Click to collapse
Wait so you managed to unlock it??
unlocked, flashed cyanogenmod tried to fix the inverted / screwed up screen, bricked it again, trying to unlock again...
LaDY Vengeance said:
You're not the only one. I am also unable to unlock. I agree with omgbossis21 when he mentions that LG blocked access to fastboot. I tried several key combinations but none worked.
The bootloader is on this thing, though. The hidden menu shows the status. Has anyone tried asking LG tech support how to access official fastboot? It must exist in order for the techs to recover the damn thing.
Sent from my LG-P769 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Usually phones that don't have a key combo for fastboot you can delete main system partitions and it would start in official fastboot like my LG motion. Not on this phone though
Sent from my LG-P769 using xda app-developers app
Have you tried holding down the vol down button when the lights flash on boot?
villan.co said:
UPDATE: http://forum.xda-developers.com/showthread.php?t=2461483
i don't know how any one is getting any of this done. i've been able to root, several times, install CWM, several times, but i can not seem to figure out how to boot into the fastboot, or into the bootloader so that i can use fastboot, so that i can unlock my bootloader. is there some magical secret that every one else in the world knows, except me???
i'm running v20d. i've got fastboot and adb installed on linux (debian), and i can shell into the phone via adb, and then substitute user* as root and delete bloat ware and every thing else - but i can't figure out how to boot into bootloader... i've tried "adb reboot bootloader" and "adb reboot-bootloader" (yes, the 2nd one is valid), but both just reboot the phone, then i see the CWM flashing lights, then it continues to boot as normal - a few times i got the dead droid icon.
i can do all this http://forum.xda-developers.com/showthread.php?p=43401184 but i can't get into the danged bootloader... this can't be just me, but it seems like i'm the only one that has no clue how to get this right
bleh! thanks in advance.
* "su -" does not stand for superuser - that's a misgnomer, and since most of the mobile hackers are windows users, they never know that little detail - and you should include the dash after su, so that the shell assumes the root user's home directory and reads the root user's .bashrc env vars, etc
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Have you tried holding down the vol down button when the lights flash on boot? Works for me to get into CWM recovery.
thanks man, but, i'm way past that point. this thread should actually be closed: http://forum.xda-developers.com/showthread.php?t=2461483

P769 LG Security Error

So I rooted my phone with a locked bootloader using this method http://forum.xda-developers.com/showthread.php?t=2173465 and went ahead and installed CWM recovery, and then tried to flash this rom http://forum.xda-developers.com/showthread.php?t=2428306
After my phone rebooted, I keep on getting this LG Security Error and cannot boot into the phone. I've tried to use the fastboot method to try and flash a new kdz, however I keep on getting stuck at the waiting for device part.. would appreciate it if anyone could help me to just restore my phone to factory settings?
cosmictrips said:
So I rooted my phone with a locked bootloader using this method http://forum.xda-developers.com/showthread.php?t=2173465 and went ahead and installed CWM recovery, and then tried to flash this rom http://forum.xda-developers.com/showthread.php?t=2428306
After my phone rebooted, I keep on getting this LG Security Error and cannot boot into the phone. I've tried to use the fastboot method to try and flash a new kdz, however I keep on getting stuck at the waiting for device part.. would appreciate it if anyone could help me to just restore my phone to factory settings?
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Click to collapse
Sounds like you made a serious error and didn't do any research before proceeding. Did you install the LG drivers prior to doing anything with the phone? If not, you have just bricked your device. L9RecoveryInstaller.apk is the ONLY way at the moment to successfully install CWM on the P769 if the bootloader is locked. I don't have all the answers myself as I'm fairly new to this device, P769, myself. There may be someone here with a little more insight as to how to fix your issue, but if you didn't install LGs drivers beforehand, I'd say your device is bricked. Sorry.
You'll need to use fastboot to flash ICS u and x. Then go into upgrade mode by holding volume up and plugging the phone to the computer. Upgrade mode should pop up and you're ready to flash any kdz using the offline flash method.
Sent from my LG-P769 using XDA Premium 4 mobile app
Or simply unbrick using the lgupdate tool. Why not go the easy way?
Sent from my LG-P760 using xda app-developers app
cosmictrips said:
So I rooted my phone with a locked bootloader using this method http://forum.xda-developers.com/showthread.php?t=2173465 and went ahead and installed CWM recovery, and then tried to flash this rom http://forum.xda-developers.com/showthread.php?t=2428306
After my phone rebooted, I keep on getting this LG Security Error and cannot boot into the phone. I've tried to use the fastboot method to try and flash a new kdz, however I keep on getting stuck at the waiting for device part.. would appreciate it if anyone could help me to just restore my phone to factory settings?
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Click to collapse
security error should appear when some system mod was been wrong (sorry bad english)
you should re-flash the firmware with kdz(this time flash a firmware with cwm and root included)
AXD96 said:
security error should appear when some system mod was been wrong (sorry bad english)
you should re-flash the firmware with kdz(this time flash a firmware with cwm and root included)
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Click to collapse
L9 P769 is a much different creature than the other P76X variants. CWM CANNOT be installed on the recovery partition unless the bootloader is unlocked. There are very few people here who have managed to unlock the bootloader on this device ( P769 ). Any attempt to modify the bootloader, boot partition, or recovery ends in "LG Security Error". As per my previous post, the only way to get CWM on this device with a locked bootloader is with the L9RecoveryInstaller.apk.
shinobisoft said:
L9 P769 is a much different creature than the other P76X variants.
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Click to collapse
Creature is right! What a nightmare this thing is!
Sent from my LG-P769 using XDA Premium 4 mobile app
N00BY0815 said:
Or simply unbrick using the lgupdate tool. Why not go the easy way?
Sent from my LG-P760 using xda app-developers app
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Click to collapse
This will not work until u use fastboot to flash ICS xand u. It will not reconize the phone until this is done.
Sent from my LGMS769 using XDA Premium 4 mobile app
Where is L9RecoveryInstaller.apk?
seshsud said:
Where is L9RecoveryInstaller.apk?
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This post
shinobisoft said:
This post
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Thanks although CWM installed fine with this apk, however on boot up (with vol - pressed) it doesnt go into recovery mode
seshsud said:
Thanks although CWM installed fine with this apk, however on boot up (with vol - pressed) it doesnt go into recovery mode
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Click to collapse
Do you have busybox installed and or do you have multiple copies of busybox installed?
If you don't have busybox, install it from the Play Store. Make sure it installs to /system/xbin.
If you have multiple copies, which I did when I had this error, use the busybox installer to uninstall all copies of busybox and then use the installer to reinstall busybox to /system/xbin.
You may need to run L9RecoveryInstaller again. It will say there is a recovery installed just reinstall anyway.
Reboot and try again.
shinobisoft said:
Do you have busybox installed and or do you have multiple copies of busybox installed?
If you don't have busybox, install it from the Play Store. Make sure it installs to /system/xbin.
If you have multiple copies, which I did when I had this error, use the busybox installer to uninstall all copies of busybox and then use the installer to reinstall busybox to /system/xbin.
You may need to run L9RecoveryInstaller again. It will say there is a recovery installed just reinstall anyway.
Reboot and try again.
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Click to collapse
Yes that worked!! Thanks! Looks like we can't get CM11 onto this phone yet...currently on 20h...can the bootloader be unlocked at all...?How to get rid of all tmobile bloatware?
seshsud said:
Yes that worked!! Thanks! Looks like we can't get CM11 onto this phone yet...currently on 20h...can the bootloader be unlocked at all...?How to get rid of all tmobile bloatware?
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Click to collapse
Cm11 is available, yes some people can unlock the bootloader. Theres a few threads about removing tmobile bloatware, along with solutions to the other questions I answered. Simply search your question and you'll find a solution. THEN if you can't find the solution by searching make a thread to ask about it. Goodluck if you try unlocking the bootloader, its quite a journey!! If you can't unlock it or the process scares you out of trying search Kuma ROM. Goodluck!
Sent from my LGMS769 using XDA Premium 4 mobile app
lwg45714 said:
This will not work until u use fastboot to flash ICS xand u. It will not reconize the phone until this is done.
Sent from my LGMS769 using XDA Premium 4 mobile app
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Click to collapse
Hi, I'm in a similar boat as the OP, successfully rooted the device but didn't realise I needed an unlocked bootloader to flash a recovery. Now I get Security Error.
Now, I keep seeing "ICS x and u" on this forum, and have no idea what it is. Yet people keep saying it like it's obvious.
Is this it? http://forum.xda-developers.com/showpost.php?p=44144663
If so, obviously I can't follow the steps because my phone won't boot up past the splash screen. And said phone isn't recognized by ADB at the moment, because I can only figure out how to boot it into S/W update mode.
Currently I can't even use the L9RecoveryInstaller.apk, because, again, can't boot up. Help?
Alucai Vivorvel said:
Hi, I'm in a similar boat as the OP, successfully rooted the device but didn't realise I needed an unlocked bootloader to flash a recovery. Now I get Security Error.
Now, I keep seeing "ICS x and u" on this forum, and have no idea what it is. Yet people keep saying it like it's obvious.
Is this it? http://forum.xda-developers.com/showpost.php?p=44144663
If so, obviously I can't follow the steps because my phone won't boot up past the splash screen. And said phone isn't recognized by ADB at the moment, because I can only figure out how to boot it into S/W update mode.
Currently I can't even use the L9RecoveryInstaller.apk, because, again, can't boot up. Help?
Click to expand...
Click to collapse
You'll need to use fastboot to flash the x and u images. They are included with the tools. Search the General section.
Sent from my LG-P769 using Tapatalk
N00BY0815 said:
Or simply unbrick using the lgupdate tool. Why not go the easy way?
Sent from my LG-P760 using xda app-developers app
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Click to collapse
C this doesn't work. It gets stuck at 4 percent during the sw upgrade process.:crying:

[URGENT]LG G3 Bricked [Solved]

today using the LG Flash tool I was trying to restore the factory Image and during this time I use to End Up with the Error Code 2. I followed a Guide wich told me to to selecet Downgrade BL and Proeed, I was successfully able to boot into windows, But Ever since then It show No Sim Car Where as I've my Simcard in it and when My Device gets connected to Wifi it shows Hands Free Activation, I am worried thinking If the phone is Locked, and its keeps circling Handsfree Activation and Later Fails. Please guide assistane on how to fix this.
aukhan said:
today using the LG Flash tool I was trying to restore the factory Image and during this time I use to End Up with the Error Code 2. I followed a Guide wich told me to to selecet Downgrade BL and Proeed, I was successfully able to boot into windows, But Ever since then It show No Sim Car Where as I've my Simcard in it and when My Device gets connected to Wifi it shows Hands Free Activation, I am worried thinking If the phone is Locked, and its keeps circling Handsfree Activation and Later Fails. Please guide assistane on how to fix this.
Click to expand...
Click to collapse
I may be wrong but you're probably going to have to restore your previous EFS. A couple months ago, after using the flash tool, that happened to me but luckily I found a way to do it, but I completely forgot how.
Sent from my LG-ls990 using XDA Free mobile app
succumbtothegreater said:
I may be wrong but you're probably going to have to restore your previous EFS. A couple months ago, after using the flash tool, that happened to me but luckily I found a way to do it, but I completely forgot how.
Sent from my LG-ls990 using XDA Free mobile app
Click to expand...
Click to collapse
Hi Guys,
I was able to successfully restore to stock without any issue, I had to do a restore using a different method, I was getting an Factory Reset Status 2.
I had to Downgrade BL and i could restore and I had to replace 2 files from another thread. and I was able to successfully get my Device working, I was even able to swith to GSM network. Thanks to all the Xda members who are so knoweledgeable.:laugh:
Any chance you could provide more details about exactly what you did, and a link to that other thread? It could help someone else.
aukhan said:
Hi Guys,
I was able to successfully restore to stock without any issue, I had to do a restore using a different method, I was getting an Factory Reset Status 2.
I had to Downgrade BL and i could restore and I had to replace 2 files from another thread. and I was able to successfully get my Device working, I was even able to swith to GSM network. Thanks to all the Xda members who are so knoweledgeable.:laugh:
Click to expand...
Click to collapse
Could you explain from what thread. I am trying to downgrade my G3 to be able to root it.
meyerweb said:
Any chance you could provide more details about exactly what you did, and a link to that other thread? It could help someone else.
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gelito81 said:
Could you explain from what thread. I am trying to downgrade my G3 to be able to root it.
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Ill be posting links soon

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