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Root LG G4 H815 on Android 6.0 Marshmallow 20A Firmware Update – How To

The latest Google’s mobile OS Android 6.0 Marshmallow has been recently released for the LG G4 model number H815. Whenever a newer firmware version released, most of the users wish to get the latest firmware update. But if you have not yet upgraded your LG G4 to Marshmallow then we have shared a guide to install Android 6.0 Marshmallow on LG G4 H815 or if you have already flashed the stock Android 6.0 update on your device then you might looking to get root access on it. Interested to install custom ROMs, third-party apps or want to enhance battery life? Then go ahead and follow the given detailed step-by-step guide. We’ll use the autoroot kernel (based on 20A software) to get root access over the internal file system of LG G4. This root kernel includes SuperSU as well as busybox and has init.d support.

Thanks to cile381 (XDA forum member) for providing this autoroot kernel and according to him, this kernel is not tweaked and has no modifications. All you need to have a TWRP recovery pre-installed on your LG G4 in order to flash the recovery .zip file. Now proceed to the installation instructions but don’t forget to take a proper backup of all your data first, in case anything goes wrong then you’ll be able to restore your data and the battery level of your phone should be at least about 80% to prevent unexpected shutdowns while rooting.

Root LG G4 H815 on Android 6.0 Marshmallow 20A


This guide containing the autoroot kernel flashable zipped file and instructions can be used only for the LG G4 bearing model number H815 (International Variant). Check the model number of your device first.


AndroidBlog will not be responsible for any kind of damage occurred to your LG G4 H815 during or after the rooting process. Proceed at your own risk.

Required Files:

Steps to Root LG G4 Running Android Marshmallow 20A Firmware:

1:- First, download the autoroot kernel file ( on the desktop of your PC from the above link.

2:- Connect your LG G4 with PC using its USB data cable and transfer the downloaded root kernel to the internal storage (root folder) of your phone.

3:- Disconnect the device and switch it off in order to boot into recovery.

4:- Switch ON the phone while pressing and holding Volume Down + Power keys at the same time for a few seconds, till the LG logo appears on the screen. Use the Volume Up/Down key for navigation and power button for highlighting.

5:- While the LG G4 is now in recovery mode, perform a full backup.

6:- Once the backup process is finished, proceed to install the autoroot kernel. Choose Install and browse the location where you have saved the file on the internal storage of your phone.

7:- Select the root file and swipe on the swipe to confirm flash option.

8:- Go back to the main menu of recovery and restart the phone by selecting Reboot system.

Done! You’ve successfully rooted LG G4 H815 on Android 6.0 Marshmallow 20A update.

Let us know in the comments area below if you have any issues or queries while install this autoroot kernel on LG G4.


Aamir Jamal

An Android Geek and audiophile who love to read and write reviews/tutorials about gadgets and new tech stuff. He has written 1007 guides and other posts.

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