How to Flash a Custom ROM on Android LG G6 H870 and US997 (2017).

How to Flash a Custom ROM on Android LG G6 H870 and US997 (2017).

Flash Custom ROM LG G6. Actually, your LG G6 device already has stock ROM or stock firmware when you buy it. This is preinstalled Android operating system. Stock ROM coming from the manufacturer usually has limited functionality. Therefore, if you want to get more features and experience on your phone you need to install or flash a custom ROM. And now, you can learn how to flash a custom ROM on LG G6 H870 smartphone. To install this custom ROM is easy, just follow this guide to get results as your expectations.

LG G6 released in 2017, March. Comes with 5.7 Inches IPS LCD capacitive touchscreen, 16M colors. Powered by Quad-core (2x2.35 GHz Kryo & 2x1.6 GHz Kryo) CPU, Qualcomm MSM8996 Snapdragon 821 chipset, Adreno 530 GPU, and 4 GB of RAM. The following is the LG G6 version, H870, US997, LS993, H870DS, G6+, H871, H872, H873, H870K, VS998.

Actually, flash custom ROM can cause your phone bricked or totally dead. For that, you have to be careful to do it. You will get some benefit if flash custom ROM on android device. Here are some of the benefits of flashing a Custom ROM.

  • Performance. You can overclock LG G6 to improve hardware performance. This performance can really feel when you are playing a graphics games. in addition, you can improve the ROM performance by removing the carrier and OEM-installed apps. Some people call it with remove bloatware to make a free up system resource.
  • Updates. You don't need to waiting for your LG G6 manufacturer to push an update to your Android phone to get the latest features. Simply you can update your phone by yourself by flashing a custom ROM on the newest Android version. Term to update Android phone use this method is called Nightlies.
  • Battery Life. You can slow down the speed of the speed of your massive processor by underclocking it. If your LG G6 processor is running at a lower speed, it will automatically extend battery life by days. Also, removing bloatware will help you free up the processor to do less. It will force your LG G6 running a fewer Apps in the background. and more.
Ok, if you understand what I mean in this guide, lets to start this guide.


  1. Download Custom ROM for LG G6 from the XDA forum. Here
  2. Download Here 
  3. You need to Flash TWRP Recovery. Visit this guide how to do it?
  4. Then Unlock Bootloader LG G6. Visit this guide to unlock bootloader LG G6.

Custom ROM LG G6 Installation.

  1. We highly recommend to backup everything stored on your phone.
  2. Make sure you have a full battery charged during the flashing process, it will keep your LG G6 life and avoid the system down during flashing process.
  3. Make sure all prerequisite above has done.
  4. Then, transfer or copy the custom ROM and SuperSU to the root directory phone internal memory.
  5. Once TWRP successfully installed on LG G6, boot your phone into fastboot mode. How to do it?
    • Press and hold Power Button + Volume UP.
  6. Once you're at the TWRP main menu, tap Install.
  7. TWRP LG G6
    TWRP LG G6
  8. Now, browse SuperSU from the internal memory root directory.
  9. Then, Swap to confirm flash.
  10. Then, back to the TWRP main menu.
  11. tap Wipe button to wipe all data on your LG G6 phone
  12. Then, back to TWRP main menu.
  13. Tap Install.
  14. Now, browse your custom ROM from the internal memory root directory.
  15. Then, Swap to confirm flash.
  16. As a final step, please tap reboot to reboot your device into the system.
  17. Finish.

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