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[GUIDE][P768]All in 1 Guide for Custom Firmware + Custom Recovery + Rooting.

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By donk165, Senior Member on 7th June 2013, 08:44 AM
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14th June 2014, 01:23 AM |#131  
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Quote:
Originally Posted by niishoux

This may lack of some sense, but...

I have a factory unlocked p768.
baseband: L6260_MODEM_SIC_01.1230.00
compilation number: JZ054K.
software version: P76820b-AME-XX.

In the reflash p768's KDZ step, should I use my country's KDZ (Venezuela, V20B-p768G)? As it's factory unlocked, is there any downside in custom ROM installing (or anything in general) by doing that?

Hi niishoux, as far as I can see, you have your p768 unlocked (congratulations) and now you want to go back to your phone's ROM? or perhaps installing custom ROMS?
If that's actually your question, I'd recommend you to carefully read the thread of your wanted rom twice or thrice. Each rom has its own limits.
Follow all the steps.
Cheers. Good luck.

Sent from my LG P76020p-EUR-XX unlocked and rooted
 
 
14th June 2014, 02:07 AM |#132  
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Quote:
Originally Posted by BajoPrimate

Hi niishoux, as far as I can see, you have your p768 unlocked (congratulations) and now you want to go back to your phone's ROM? or perhaps installing custom ROMS?
If that's actually your question, I'd recommend you to carefully read the thread of your wanted rom twice or thrice. Each rom has its own limits.
Follow all the steps.
Cheers. Good luck.

Sent from my LG P76020p-EUR-XX unlocked and rooted

I didn't unlock it, it came unlocked. One of my questions should be: Is the bootloader locked still? This "factory unlock" just counts for phone carriers use or bootloader comes unlocked too? (I think no). As I understand the first post, you install p760's KDZ because it's where you can unlock the bootloader. So, what I should have said would go like this:

I have an unknown KDZ right now (Unknown for me, at least. Because it doesn't have a country or carrier attached to it). After installing p760's KDZ for bootloader unlocking, to which p768's KDZ should I come back? It matters in any way If I now attach my phone to use my country and carrier V20B version? Do I have to use other one?
16th June 2014, 10:57 PM |#133  
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Sorry, I havnt checked in on this thread in a long time, ill have to update the post if things have changed for the L9, I sold mine and changed to Xperia SP, mainly in those boards now.

Sent from my C5303 using XDA Premium 4 mobile app
15th July 2014, 03:28 PM |#134  
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Quote:
Originally Posted by MrWhisper

I already flashed P760 V20B Europe Open to my P768

adb devices recognize my phone but adb reboot oem-unlock is not working. my phone just reboot and go straight to LG logo, no black screen with white text.

not working on both Windows 8.1 and elementaryOS (Ubuntu 12.04 with kernel 3.10)

me have this problem with my phone.
please tell what should i do?
9th August 2014, 07:22 AM |#135  
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Hi Boss
when I was unlocking bootloader , there was an step :

Step 3. Connect your phone to WiFi and make sure you are able to access the internet. Then leave your phone for 30 mins. This makes sure the device is ready to be unlocked.

At that time I was not able to access the internet and I closed my eyes and escaped this step .

now I have a lot of issues with wifi ( specially with MOKEE and MIUI roms ) .
In MIUI I never could connect the internet and in Mokee , in 1st boot it connects but tomorrow , wifi do not works .

Any idea ?
should I lock my bootloader and unlock it again or any other clue or patch or ... ?

---------- Post added at 09:52 AM ---------- Previous post was at 09:49 AM ----------

Quote:
Originally Posted by arman0077

me have this problem with my phone.
please tell what should i do?

salam
fekr mikonam kar shoma dorost boode va kar tamoome .
gooshi ro be halate S/W update be pc vasl kon . ba horrofe sefis , oon bala neveshte bootloader unlocked .
4th December 2014, 10:28 PM |#136  
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I don't seem to be able to find V20B/V20C P760 kdz files. All I find is V20H P760.
Should I go ahead with that?
9th February 2015, 11:28 PM |#137  
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Quote:
Originally Posted by donk165

P768 Bootloader Unlock Guide + Installing Custom Recovery with fastboot + Rooting Stock ROMs via Recovery + Installing Custom ROMs via Recovery

This guide is fairly straight forward, please note; I didn't create most of these steps, I just joined them together from various other threads. This guide assumes you have experience in adb/fastboot commands and offline flashing.

Warning! - Unlocking your bootloader voids your device's warranty. You have been warned.

Make a backup of your data before following this guide!

Required Stuff
P760 V20B or V20C Europe Open KDZ and your choice of P768 V20 Jelly Bean KDZ
KDZ Offline Flashing Tools (see attachments of 1st post)
Fastboot Package (see attachment of 1st post)
ADB + Fastboot Package
CWM 6.0.3.1 Non-Touch
CWM 6.0.3.1 Touch
TWRP 2.5
SuperSU CWM Root Zip


A quick tip for opening a command prompt wherever you currently are in Windows Explorer - Shift + Right Click will add 'Open command window here'. This means you can extract fastboot and adb anywhere on your PC.

Bootloader Unlock

So far, the P768 does not have the ability to unlock the bootloader normally, so to do this, we have to flash P760 software which can unlock the bootloader. Lucky for us P768 users, flashing P760 KDZ doesnt affect our screen like P769 users. It still has problems but we are only using it to unlock - nothing more. Bootloader unlocking is a one time action - Once its unlocked, it stays unlocked if you change KDZ/ROM.

Extra step. If you need to keep all your data before doing this unlock, root with the lelus method and then install the locked bootloader version of CWM and then take a nandroid backup. You can restore it once you have custom recovery at the end of this tutorial. (Thanks to lelus for tip)

Step 1. Flash the P760 V20B/V20C Europe Open KDZ to your phone with the offline flash method. After flashing, you may need to hard reset for the phone to boot.
Step 2. Connect your phone to your PC in LG Software Mode with USB Debugging switched on.
Step 3. Connect your phone to WiFi and make sure you are able to access the internet. Then leave your phone for 30 mins. This makes sure the device is ready to be unlocked.
Step 4. Extract 'ADB_and_Recovery_Images-P768.rar'. Navigate to where 'adb.exe' is stored on your pc and open a command line (Shift + Right Click in Windows Explorer.
Step 5. Check your phone has been recognised by typing 'adb devices'. If your phone is connected, type 'adb reboot oem-unlock'
Step 6. You should have a black screen with white text with a confirmation to unlock the bootloader. Press Volume Up button to unlock the bootloader. Now you will be in LG Fastboot mode.
Step 7. Switch off the phone by holding the power button for 10 seconds. Switch your phone back on.
Step 8. Use Offline flash method to flash back to your desired P768 Jelly Bean version. After flashing, you may need to hard reset for the phone to boot.
Step 9. Once you have P768 Firmware reinstalled, boot and setup your phone.

Installing Custom Recovery with Fastboot

Now our phone doesnt allow us to switch to fastboot mode in the same way that P760 users do. I have found that using lelus's fastboot script, we can switch to fastboot and then send recovery.

Step 1. Extract fastboot.zip and install fastboot drivers by following README instructions.
Step 2. Place chosen recovery into the fastboot directory and rename it to 'recovery.img'
Step 3. After installing drivers, navigate to where 'fastboot.exe' is stored on your pc and open a command line (Shift + Right Click).
Step 4. Minimise the command line you opened, then Open 'start.bat' from extracted fastboot.zip.
Step 5. Select option 1. Switch off your phone, remove the battery and then hit enter. Insert USB cable and then insert battery after 4 seconds.
Step 6. Once you are in fastboot mode, your phone will show a black screen. Switch to the command line opened in step 2. Type 'fastboot devices' to check your device has been recognised.
Step 7. Type 'fastboot flash recovery recovery.img' to send the recovery image
Step 8. Reboot by typing ' fastboot reboot'

Extra step. If you took a backup of your data partition at the start. Restore your backup now to regain all data from pre-mod backup.

Rooting with Recovery

Now we have a working Custom Recovery, rooting is easy.

Step 1. Switch to recovery by either using 'adb reboot recovery' or by holding Volume Up + Home when switching on the phone.
Step 2. Install SuperSU by selecting 'Install ZIP from SDCARD' and then choosing 'SuperSU-v1.32.zip'
Step 3. Go to advanced and choose 'Fix Permissions', then Reboot phone.
Step 4. Install 'Busybox' from Play Store and Smart Install busybox to xbin location.

If you took a backup of your data partition at the start. Restore your backup now to regain all data from pre-mod backup.

Now your P768 is free of its shackles and should be able to run custom ROMs. If you are not interested in Custom ROMs, stop reading now....



...We have a customised version of stock ROM, and 2 CM based ROM's which are stable enough for daily use. We also have a PAC-Man ROM and MIUI V5 being developed. We also have a patch to get a few other CM based ROMs to work on our phone, SlimBean and Super Luminal work, ChameleonOS, AvatarRom and PenberRom might work.

  • Jishnu Sur has made a customised version of the stock ROM which includes little tweaks and extra LG features ported from other LG UI3 phone software - LG G2. Runs great and has aroma installer to select your device during install. - {Jelly Cream V1}
  • Artit has created a P768 version of CyanogenMod 10.1.3 and 10.2, they work really well and only have the bugs present in the p760 build - no 1080p video recording. 10.1.3 is 4.2.2 and 10.2 is 4.3 {CM10.1.3 Final} {CM10.2}
  • Artit has created a P768 version of PAC-Man ROM Milestone.1, I haven't tested this one yet. GPS is fixed I believe. {PAC-Man m1}
  • Artit has created a version of MIUI V5 for all L9's, This is my current daily driver, MIUI is a really nice feeling android experiece.{MIUI V5 Beta 2}
  • Artit has also created a patch to get CM based ROMs for p760 to work on our p768s. The thread with the information can be found here. Roms to patch SlimBean, SuperLuminaL, Avatar ROM, PenberRom, Chameleon OS.

Installing a custom ROM

Installing custom ROMs is as simple as wiping a couple of directories and flashing the zip file via recovery.

Step 1. Copy the custom ROM zip to your SD card and gapps if needed.
Step 2. Boot into custom recovery by switching on the device holding volume up + home + power buttons or by using a Rebooter app.
Step 3. Take nandroid backup of current ROM.
Step 4. Wipe system, data, cache and dalvik cache directories.
Step 5. Install ROM zip package + gapps if ROM requires them.
Step 6. Reboot and setup phone.

***Step 4 can be changed if you are only upgrading an existing custom ROM. For this, only wipe cache and dalvik cache and then continue the installation.

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Thanks to:
Aremcee - for the original bootloader unlock guide
cmahendra - for his offline flashing guide + bootloader unlock guide and general guidance
lelus - for his fastboot script, TeamWin Recovery for L9 and general guidance
artas182/clockworkmod team - for ClockworkMod for L9
Jishnu Sur - for his awesome Jelly Cream ROM and for developing for a phone which he doesnt own!
artit - for his work on both Jelly Cream ROM and his own custom ROMs and Patch development!
Anyone else who has helped me out during my time on the L9 Forums!





i have LG P769 and i tried to root and install custom rom from a tutorial https://www.youtube.com/watch?v=WyNtFP_TkKc and now i am stuck with mirror touch and inverted color in my mobile. Even i tried to fast boot it but cant do it, it get stucks at waiting device in cmd and cant go further from the screen plz help
if possible a video tutorial will be more helpful plzzzzz
10th February 2015, 05:12 PM |#138  
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Quote:
Originally Posted by Maniyac

i have LG P769 and i tried to root and install custom rom from a tutorial https://www.youtube.com/watch?v=WyNtFP_TkKc and now i am stuck with mirror touch and inverted color in my mobile. Even i tried to fast boot it but cant do it, it get stucks at waiting device in cmd and cant go further from the screen plz help
if possible a video tutorial will be more helpful plzzzzz

I dont mean to be a dick, but this is P768 unlock guide, not P769. Im sure theres a few guides for unlocking the P769 bootloader around, back when I still owned this device, there were quite a few guides for each version of the L9. I hope you can find the guide you need.

I cant make a video guide as I dont own the device anymore and I dont have any of the LG files on my PC anymore. Sorry I cant be of more help.
26th April 2015, 06:00 PM |#139  
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in step 5 when i type adb reboot oem-unlock phone restarts and boots, no black screen no text no confirmation, nothing.
and when i want to check if bootloader is unlocked in the hidden menu it crashes.
what can i do ?
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