Unlock LG G4 Bootloader

The previous rooting method we posted for LG G4 was somewhat inneffective for a lot of users as they failed to get past the TWRP app. However, things are different now — since we have the beautiful LG G4 in our hands, we are fully able to understand the workings of the phone. Rooting an LG G4 is somewhat similar to rooting the old Galaxy S series phones. All you need to do is to flash a custom recovery and flash the SuperSu from there. However, if you plan to keep your OTA in tact, then you can either forget this method or kiss your OTAs goodbye.

Rooting the G4 like this requires you to unlock the bootloader, which isn’t all that difficult. LG officially supports unlocking the bootloader, however, you will lose the ability to get FOTA (Firmware Over The Air) but if that’s not an issue for you, then simply proceed.

Note: This method is only for EU version of LG G4 and the variant model should be H815.


  • Make sure that your phone has enough battery, we’d suggest to charge it to at least 70 percent.
  • Download and setup ADB, if you don’t know how to, check out the tutorial here.
  • Download LG USB drivers from here.
  • Download TWRP recovery and SuperSU zip. Rename the TWRP file to ‘twrp.img’ without quotes.
  • Make sure you have unlocked your boot loader, in case it isn’t; check out the link for detailed instructions.
  • Enable USB debugging by going into Settings -> About Phone -> Build Number (tap on the build number for 5-7 times)

Unlock LG G4 Bootloader and Install TWRP

  • Connect your LG G4 to your PC using a micro USB cable.
  • Copy the twrp.img and SuperSu.zip to your phone.
  • Open command window in the folder where the TWRP.img is located by holding shift key and pressing the shift key and clicking right click on mouse and then selecting ‘open command window here’.
  • Now type ADB devices to check if ADB is working, your device will be listed below.
  • Type the following command in the command prompt

    adb reboot bootloader

  • The phone will reboot into bootloader, then type the following command to boot into recovery

    fastboot boot twrp.img

  • Your phone will reboot into recovery.
  • Tap on ‘Install’ and click on ‘Image’ at the bottom right.
  • Now scroll down in the folder and select TWRP.img and simply select the file and swipe to flash it.
  • Now go back and click on ‘Install’ now select the SuperSu.zip you copied and flashed it too.

That’s it, you have successfully unlocked the bootloader, installeted TWRP and rooted your phone. In case of any issues, feel free to let us know.


  1. […] Good news for the LG G4 owners, the official CyanogenMod 13 has made its way to LG G4. Though it is still in Nightly state, but fans would be happy to know that the best custom ROM is available on their phones right now. As always, you will be needing an LG G4 H815 or H811 with unlocked bootloaders; the latter already has a factory unlocked bootloader, as for the H815, you can unlock the bootloader by going here. […]


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