Requirements:
You must have TWRP 2.8.7+ installed to use these zip files. Thanks to Dees_Troy as always for that. Or you need
LGUP installed to flash the KDZ in download mode.
Install Directions:
You can install stock 20i M with zip files in TWRP or flashing a KDZ in LGUP or LG Bridge. Due to the new 20i bootloader
fastboot oem unlock requirements there is almost no benefit in using one method over the other.. both KDZ or ZIP upgrade methods work. If coming from Lollipop there is no way to retain TWRP or root since the new bootloader has a new unlock method.
To flash via zip in TWRP:
1. Download
LG-H81120i-Flashable.COMPLETE.zip place it on internal or external sdcard (external preferred).
2. (re)Boot into TWRP if not there already.
3.* Backup current partitions: boot, system, data, efs to external sdcard if possible (optional but suggested)
4.* Up to you if you want to wipe data (TWRP > Wipe > Swipe slider) but not needed if coming from a stock rom.
5. Install LG-H81120i-Flashable.COMPLETE.zip (Install > select zip > swipe to confirm/flash)
6. After zip finishes you can reboot into M! (if TWRP asks if you want to install SU, HIT NO!!!)
7. If you want root or TWRP follow the bootloader unlock directions in the next section below.
To flash via KDZ:
1. Easiest way to flash the KDZ is just using the official LG Bridge tool. You can grab it for
Windows or Mac HERE
2. Alternative to LG Bridge is downloading the 20i KDZ yourself from the Codefire directory link further below then following the
LGUP thread HERE for a how-to on KDZ flashing. .
3. If you want root or TWRP follow the bootloader unlock directions in the next section below.
Bootloader OEM Unlock + Root:
Starting with the Android 6.0 20i bootloader it has to be unlocked, sorta like a Nexus, with fastboot. Previously only 'OEM Unlock' had to be toggled in Android Developer settings for TWRP or custom boot images to work.
1. Flash stock 20i using zip or KDZ. Boot into Android after upgrade to 20i.
2. Download the
twrp-2.8.7.1-h811.img file HERE. This file needs to be on your computer and external sdcard*.
3. Download the latest SuperSu zip (2.67+) from
HERE [Thanks to Chainfire] and stick on external sdcard*.
4. Confirm "OEM Unlock" is set to enabled in the hidden Developer Settings.
5. Enable "USB Debugging" in Developer Settings, connect USB cable PC <-> Phone... and send the following 3 commands in command prompt/terminal:
Code:
adb reboot bootloader (phone reboots to bootloader)
fastboot oem unlock (this wipes ALL data!!)
fastboot boot twrp-2.8.7.1-h811.img (phone boots TWRP)
6. For perm TWRP: In TWRP hit
Install >
Images... (bottom right corner) > select TWRP.img on ext sdcard > select "recovery" > swipe.
7. If you want root: Hit the Home button > Install > select SuperSU zip on external sdcard > swipe.
8. All done. Reboot into Android. (if TWRP asks if you want to install SU, HIT NO!!!)
*if you do not have an external sdcard to save SuperSU and the TWRP.img onto.. you will need to skip saving the files to sdcard until AFTER you
fastboot OEM unlock and boot into TWRP. After fastboot booting TWRP you can use adb push to put SuperSU and TWRP.img onto the internal sdcard to install with TWRP. Or you can use the MTP mount option in TWRP and drag n' drop the files from the computer to the phone. You cannot store the files on the internal sdcard before the OEM unlock because OEM unlock wipes all you data.
Please do not mirror my files!
Downloads:
LG-H81120i-Flashable.COMPLETE.zip
100% stock untouched system, boot, modem and bootloader.
LG-H81120i-Flashable.Modem.zip
This is a flashable stock 20i modem.
LG-H81120i-Flashable.Boot.zip
This is a flashable stock 20i boot.img. Boot.img contains kernel + dtb + ramdisk.
LG-H81120i-Flashable.Bootloader.zip
This is a flashable stock 20i bootloader. It contains aboot, factory, hyp, laf, pmic, raw_resources, rpm, sbl1, sdi, sec and tz.
If you have not already unlocked the bootloader through fastboot on 20i or higher... you will need to run stock LG M to unlock before using the M bootloader on CM or AOSP roms.
Also, KDZ + all stock images for 20i are available in the link below...
CODEFIRE DIRECTORY
MD5 Sums:
Click button below to view MD5 for each file...
Downgrade:
To downgrade you can use TWRP to restore your backups... and then just flash the matching bootloader zip and modem zip from my previous threads... or just check the CODEFIRE DIRECTORY link for previous stock files.
OR
Use LGUP
HERE to flash a previous KDZ version. KDZ will remove TWRP but easy enough to reinstall that.
