Guide To Install Stock Android 6.0 Marshmallow 20A On LG G4 H815 Using TWRP Recovery. - Android Guide

Guide To Install Stock Android 6.0 Marshmallow 20A On LG G4 H815 Using TWRP Recovery.

Guide To Install Stock Android 6.0 Marshmallow 20A On LG G4 H815 Using TWRP Recovery.

Install Stock Android 6.0 Marshmallow On LG G4 H815. Todays guidebelajar will share to all LG G4 android user to update android system on it using Android 6.0 Marshmallow. On this year, October 2015 LG announced to release the new Android 6.0 Marshmallow to it's 2015 flagship smartphone LG G4. but the roll-out process was deferred in the last minute for reasons unknown. Only some defined country get OTA update for this new android version. So, if you live at the other country you will be able to update android system using newest Android 6.0 Marshmallow.

But some developer at XDA Developer Forum has been made Stock ROM Android 6.0 Marshmallow available online. Here are some flashable zip files that will take your LG G4 H815 variant to Android 6.0 Marshmallow without the complicated step to flashing the KDZ file. But if you want the other method to flash LG G4 H815 with kdz file, you can see this guide. The listed files are from software version 20A that comes with the official KDZ firmware and includes the system (stock ROM), boot, modem and bootloader zips.

If you use this method, your bootloader will still be unlocked and you can gain root access later by installing the SuperSU package over this ROM, and the other advantage of this method you can also downgrade you LG G4 android system.

What you need to start Install Stock Android 6.0 Marshmallow On LG G4 H815 ?

  1. Make sure that your device is LG G4 H815 phone, because our guide is specifically for LG G4 H815 variant only. if tried on other android devices, it might get bricked 
  2. To ensure what is device model on your device now, you can check by go to Setting ->About Phone -> model number.
  3. Make sure the device is rooted before going ahead with custom ROM installation.
  4. Installing Stock Android 6.0 Marshmallow On LG G4 H815 requires clearing of memory in the smartphone, and will delete all data stored, 
  5. To backup your important data, like SMS you can see this guide. 
  7. All USB driver that apropriate with LG G4 device must be installed correctly. or else your LG G4  will not be recognised by the computer. If you don't have any USB driver you can download here 
  9. To keep the battery capacity enough for upgrade process, you need at least 80% of battery capacity, otherwise you can connect power adapter to ensure battery life. 
  10. Unlocked bootloader is required in order to flash the system and boot images on your LG G4. To unlock the bootloader on your device, get to the official page.
  11. Or you can see this guide to Unlock Bootloader LG G4 

Download Tools.

To Install Stock Android 6.0 Marshmallow 20A On LG G4 H815, you need tools below.
  1. System ( Here 
  3. Modem ( Here 
  5. Boot ( Here 
  7. Bootloader ( Here 

Guide To Install Stock Android 6.0 Marshmallow 20A On LG G4 H815.

  1. TWRP recovery must be installed on your LG G4 devices. For detailed TWRP installation instructions using fastboot, see this guide. 
  3. After downloading Android Marshmallow 20A stock ROM in to your computer, then connect LG G4 to the computer.
  4. Place the Android Marshmallow 20A stock ROM into the phone's storage memory, and you must palce .zip file in the storage root folder, not in any other folder.
  5. Now reboot into Custom Recovery (like TWRP). To boot into TWRP,
    • First turn off your LG G4 device
    • Then press and hold volume down and power keys at the same time.
    • If you see the TWRP logo, that means you have successfully booted into the recovery.
  6. Once your LG G4 entering the TWRP settings menu, clear phone's memory (full) by selecting 'Wipe' option.
  7. wipe - twrp recovery
    wipe - twrp recovery
  8. Once done, select – 'Factory Reset' perform factory reset.
  9. And then, tap swap to factory reset. You can cancel this option by pressing back button.
  10. Now go back to the TWRP main menu or home screen and tap on the install option. 
  11. Select zip file on SD card.
    select Zip SD card - twrp recovery
    select Zip SD card - twrp recovery
  12. Navigate to the ROM files. 
  13. Now select modem 
  14. On the next screen tap Add More Zips and select system, repacked boot and bootloader in their respective order.
  15. Swipe the confirmation button to proceed with the installation. The ROM will be installed.
  16. Flashing of the custom ROM begins and after few minutes, a message 'Successful' appears on the screen, thus completing installation.
    successfully installation - twrp recovery
    successfully installation - twrp recovery
  17. Then tap on Wipe Cache/dalvik
  18. On the next step, Swipe to wipe. you can cancel this action by pressing back button.
  19. Now, reboot to system.
  20. If you see the new boot logo, that means you have successfully installed the ROM on your LG G4 device.
  21. If you come across any boot loop or face system errors, try a factory reset from the recovery or you can always restore your previous ROM from the backup.


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