How To Root LG G4 (H815), Unlock Bootloader and Install Custom Recovery

Note:  This guide is only for LG G4 (H815). You  need to have a custom recovery and an unlocked bootloader, otherwise you cannot root your G4. Follow the steps carefully. I'll be not responsible if you mess up and any kind of soft brick.

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Enable LG G4 OEM Unlock & Developer Options:

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• The first thing you need to do is to go to the settings menu on your LG G4.

• From there, go to “About Phone”.

• Scroll down until you find “Build Number”. Quickly tap it seven times to enable developer options.

• Go one step back. There’s a new option called “Developer Options” besides “About Phone”.

• Tap on it. Enable “USB Debugging” and then tick the “OEM Unlock” box.

This will enable OEM unlock your LG G4 and will allow you to go in fastboot mode.



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Unlock LG G4 Bootloader:

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This is the official method recommended by LG. Before proceeding with the procedure below, please backup every important data you have in your smartphone in case something goes wrong.

Before following the guide below, make sure you have installed ADB drivers and enabled OEM unlock. You will need the drivers for the computer to recognize the phone and OEM unlock needs to be enabled so the phone can go in fastboot mode.

• Go here, Login or Register.

• You will receive a confirmation email. Tap the link to confirm your account.

• Head over to this page to unlock the bootloader of the LG G4.

• Select your phone with model number LGH815 and enter the IMEI number as well as your Device ID.

• You can check your IMEI number by going to Settings > About Phone.

• To find your Device ID, launch CMD and enter the following codes:

          adb reboot bootloader
         

     fastboot oem device-id

• You will get two lines of numbers. Copy them into a single line and enter them on the required fields on the unlock bootloader page.

• You will receive an email from LG with an attached file called unlock.bin.

• Open CMD again on the folder where unlock.bin file is located and enter this command:

       fastboot flash unlock unlock.bin

That is it. Your LG G4 will now have an unlocked bootloader and you can install a custom recovery and root the phone.


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Install TWRP Recovery on LG G4 (H815):

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Follow the steps to install TWRP recovery.

• Download the latest TWRP .img file for the LG G4: twrp-2.8.6.0-h815.img.

• Move the .img file in inside the android-sdk-windows folder.

• Put your phone in bootloader mode and run the following code:

      fastboot boot twrp-2.8.6.0-h815.img

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Rooting Process:
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Download UPDATE-SuperSU-v2.46.zip file and move it to the internal storage of   your phone.


Turn the phone off and boot into recovery mode.


There, go to “Install” and navigate to the folder where the SuperSU zip file is located.


Swipe to confirm the flashing process.





Once the flashing process is over, reboot your phone. Your LG G4 will now be rooted and  will have SuperSU apps installed which will grant root access.