[TUTORIAL][D802] Root, install recovery and update bootloader for NEWBIES/NOOBS! - G2 General

Hello,
Many people have problem with bricked device because they complied many diffrent tutorials and broke their G2.
I will explain you how to root stock rom/update bootloader and back to stock via lg flashtool.
Perform operations step by step
Okay, so first thing - ROOT STOCK LG ROM.
1. Stump ROOT (Without usb cable, working with 20h ROM)
Stump Root v1.2 (Newest version)
-->> Download Stump ROOT v1.2 <<--
Go to settings>general>security and check "Unknown Sources" to install external APKs.
Now install Stump ROOT app from download link. (In installation progress Android will ask you for install permisions because this integrate in system code. OFC ACCEPT)
Open Stump ROOT and press GRIND, then wait sec and press BruteForce, after 1-2 min your device will restart and now u got ROOT, u need install -->> SuperSU <<-- from market.
2. Install TWRP for your device. (Autorec)
-->> Download AUTOREC <<--
Okay, it's easiest step, just install Autorec application (Be sure it's for your model in file name!)
Open, accept and flash.
This way will downgrade your bootloader and kernel. After device reboot u have already ROOT and TWRP.
Now u can update first your TWRP to newest 2.8.5.1
-->> HERE THEARD WITH NEW TWRP <<--
If you download new TWRP, then u can easy flash it via -->> Flashify <<-- app from market. There select recovery>zip and select your new TWRP, it will reboot device to recovery and flash. (BE SURE IT'S FOR YOUR D802 MODEL!!)
3. Update bootloader. (IMPORTANT!!! U ALWAYS NEED UPDATE BOOTLOADER WITH VERSION ROM WHAT YOU ALREADY HAVE, IF YOUR ROM V20H, USE 20H BOOTLOADER, IF YOU HAVE 20D, THEN USE 20D BOOTLOADER OR UPDATE YOUR DEVICE TO 20H!!)
Now u need becareful, because it is easy way to brick device if you will not perform tutorial.
-->> Download v20h bootloader <<--
Download bootloader to your memory storage in device, and open flashify, press Menu button and Reboot Recovery, when it will reboot to TWRP, press INSTALL and select bootloader v20h zip file in path you downloaded it.
Now reboot device and Enjoy ROOTED device with newest bumped TWRP and newest bootloader.. AND NO BRICK )
Enjoy your powerfull device.
I will update theard with new steps like install kernels, back to stock step by step, easiest way to secure your device.
I know there are many tutorials, but we have still many people on XDA with problems like QS_BULK device, 9008, secure verify problem etc etc. So this is way to bypass every danger things.
Im not creator of any used in this tutorial mods, i just complied few theards to few easy steps
Credits:
Dorimanx
Cloudyfa
blastagator
jcase
Codefire Team

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Hi good Job!
I have Two questions.
Can i upgrade my twrp Version with flashing the zip file in twrp?
Which Bootloader version use cyanogenmod 12?
Thank you!

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A few additional info for the D802 variant:
-You don't NEED to change boot loader if you're fully on stock unless:
--You plan to use AOSP Lollipop
--You use any JB based ROMs (they should say in their respective threads for the D802)
-If you stick with the KK boot loader, only flash BUMPed flashables (they should state if they use this method)
-I recommend to use Blastagator's TWRP as it has thermal protection that stock TWRP doesn't have
-Only flash ROMs/any other flashables while the phone is cool
-Most ROMs can use the KK modem unless stated otherwise
Correct me on any misunderstood/incorrect information
---------- Post added at 10:56 AM ---------- Previous post was at 10:48 AM ----------
exxilee said:
Hi good Job!
I have Two questions.
Can i upgrade my twrp Version with flashing the zip file in twrp?
Which Bootloader version use cyanogenmod 12?
Thank you!
Click to expand...
Click to collapse
1. You should be able to
2. You should be on the JB boot loader, we don't have the 12B one, that's for another variant

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exxilee said:
Hi good Job!
I have Two questions.
Can i upgrade my twrp Version with flashing the zip file in twrp?
Which Bootloader version use cyanogenmod 12?
Thank you!
Click to expand...
Click to collapse
Yes. If you installed AutoRec and u are able to open recovery, you can flash via older twrp. It is no problem

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goodguy25 said:
A few additional info for the D802 variant:
-You don't NEED to change boot loader if you're fully on stock unless:
--You plan to use AOSP Lollipop
--You use any JB based ROMs (they should say in their respective threads for the D802)
-If you stick with the KK boot loader, only flash BUMPed flashables (they should state if they use this method)
-I recommend to use Blastagator's TWRP as it has thermal protection that stock TWRP doesn't have
-Only flash ROMs/any other flashables while the phone is cool
-Most ROMs can use the KK modem unless stated otherwise
Correct me on any misunderstood/incorrect information
---------- Post added at 10:56 AM ---------- Previous post was at 10:48 AM ----------
1. You should be able to
2. You should be on the JB boot loader, we don't have the 12B one, that's for another variant
Click to expand...
Click to collapse
I just wrote this tutorial for Stock, and it's always good to have new stuff. It's safe with bumped twrp and it shouldn't make any problem with device.

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Thank you guys!
So i dont need to change my Bootloader to Flash cm12?
Installed twrp via autorec and im on Stock kk.

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exxilee said:
Thank you guys!
So i dont need to change my Bootloader to Flash cm12?
Installed twrp via autorec and im on Stock kk.
Click to expand...
Click to collapse
U no need, no matter u have JB or KK bootloader if you use CM12 or other AOSP ROMs

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Ganjax said:
I just wrote this tutorial for Stock, and it's always good to have new stuff. It's safe with bumped twrp and it shouldn't make any problem with device.
Click to expand...
Click to collapse
Ok, good. I liked your tutorial, pretty informative.

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Hello, i'm stuck at this step :
"3. Update bootloader. (IMPORTANT!!! U ALWAYS NEED UPDATE BOOTLOADER WITH VERSION ROM WHAT YOU ALREADY HAVE, IF YOUR ROM V20H, USE 20H BOOTLOADER, IF YOU HAVE 20D, THEN USE 20D BOOTLOADER OR UPDATE YOUR DEVICE TO 20H!!)
Now u need becareful, because it is easy way to brick device if you will not perform tutorial.
-->> Download v20h bootloader <<--
Download bootloader to your memory storage in device, and open flashify, press Menu button and Reboot Recovery, when it will reboot to TWRP, press INSTALL and select bootloader v20h zip file in path you downloaded it. "
Edit : i flashed the rom without KK bootloader and it worked
-> I Was on 20H. I rooted, installed twrp, updated twrp. I've flashed 20d KK bootloader and now, secure booting error
I have access to download mode. What can i do do boot normally ? (i know i could probably flash a kdz but i don't really want to)

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i cannot enter into the twrp by pressing the vol down + power, it just ask me whether i want to format, this means i still do not have twrp ?

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coc014 said:
Hello, i'm stuck at this step :
"3. Update bootloader. (IMPORTANT!!! U ALWAYS NEED UPDATE BOOTLOADER WITH VERSION ROM WHAT YOU ALREADY HAVE, IF YOUR ROM V20H, USE 20H BOOTLOADER, IF YOU HAVE 20D, THEN USE 20D BOOTLOADER OR UPDATE YOUR DEVICE TO 20H!!)
Now u need becareful, because it is easy way to brick device if you will not perform tutorial.
-->> Download v20h bootloader <<--
Download bootloader to your memory storage in device, and open flashify, press Menu button and Reboot Recovery, when it will reboot to TWRP, press INSTALL and select bootloader v20h zip file in path you downloaded it. "
Edit : i flashed the rom without KK bootloader and it worked
-> I Was on 20H. I rooted, installed twrp, updated twrp. I've flashed 20d KK bootloader and now, secure booting error
I have access to download mode. What can i do do boot normally ? (i know i could probably flash a kdz but i don't really want to)
Click to expand...
Click to collapse
Well if you cant enter your recovery or system then you have to flash kdz.
chris7617 said:
i cannot enter into the twrp by pressing the vol down + power, it just ask me whether i want to format, this means i still do not have twrp ?
Click to expand...
Click to collapse
You already flashed TWRP right? If so then you need to confirm it twice with the power button. It says like format data/factory reset but it will boot into the custom recovery.

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please help me...i have a lg g2 d802 32gb model ..its a traded phone...when i got the phone it was running 4.4.2 kitkat the phone was rooted bt there was no suprrueser app i installed the app and then i flashed recovery with autorec now whenever i open my data or wifi and use my phone for some minutes my screen becomes unresponsive is it due to the jellybean bootloader that the autorec installed or something else please help me...

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Recovery combo gone
The thread seems like dead now, but maybe I get help .
I flashed 20H and now there is the recovery combo, when I try pwr + volume down it simply reboots . The recovery is instaled, but I only can access it from software (that now is corrupted, so, soft brick).

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Wrong combo
chris7617 said:
i cannot enter into the twrp by pressing the vol down + power, it just ask me whether i want to format, this means i still do not have twrp ?
Click to expand...
Click to collapse
You're not soft bricked, it's just that key combo changes in 20H, new combo to enter recovery is vol down + power key, As lg logo appears, release keys and press vol up + vol down and you can easily access twrp

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and i ran intro bootloop.. help!

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I'll update theard soon to aosp/lollipop support, bootstacks explains etc.
Wysłane z mojego LG-D802