How to Root LG G3 F400K/ F400L/ F400S/ LS990

How to Root LG G3 F400K/ F400L/ F400S/ LS990 – LG G3 is the successor of the LG G2 which was released in 2013, this phone would bring better specs and features than the previous series. By launching the LG G3, the South Korean company is expected to compete with the HTC One M8, Sony Xperia Z2, and compatriot rival the Samsung Galaxy S5. Great expectations imposed on LG G3, so do not be surprised if this phone will have better specs and more features than any other vendor.

That attracts attention is on the screen of the LG G3, because this phone uses a resolution of 1440 x 2560 pixels. This resolution would surpass flagship smartphones like the Samsung Galaxy S5, and not only that LG also complements LG G3 with HD-IPS display with ~ 534 ppi pixel density. Using the Qualcomm Snapdragon MSM8974AA 805 chipset, which has a CPU speed of 2.3 GHz quad-core Krait 400, a good option for LG because the CPU is the best in the 2014’s. And to add the Performance of LG G3, already available 3 GB of Ram combined with Adreno 330 GPU. Not only superior in the display sector, and processor sector, LG G3 is also equipped with 16 megapixel camera, which can record video with 2160p @ 30fps 2K quality. While the front camera, 2.1 MP camera has pinned that appear quite optimal, with the ability to record Full HD quality video.

This root guide is meant for the LG G3 F400K/ F400L/ F400S/ LS990. This tutorial using IOroot Kit on Windows PC. Smartphone Clinics is not responsible for any gain or loss incurred as a result of following this guide. Root your device at your own risk.


  • Make sure you install the LG G3 USB drivers on your PC, if you haven’t already.
  • Make sure the battery on your mobile phone is more than 60%
  • Enable USB Debugging, by open Settings > Developers Option > USB Debugging
    (If Developers Option is hidden, go to Settings > About Phone > Built Number (tap on it for 5-8 times)

How to Root LG G3 F400K/ F400L/ F400S/ LS990

  • Download IOroot Kit and extract it on your PC
  • Connect your LG G3 to your computer
  • Open the ioroot folder that you extracted to the desktop and double click on the root.bat file.


  • A command terminal will open up and start running. When asked, press any key on your keyboard to continue with the process and follows the instructions as they appear.
  • Now, it will ask you to unplug the smartphone from the computer and disable the USB debugging and re-enable it. Once you are done connect your smartphone to the computer and press any key to continue.

IOroot Kit root

  • When a warning message appears, press any key from key board to continue
  • Now disconnect your LG G3 and restart it.
  • Done!

For more details, please watch this following video.

 Congratulation! Now your LG G3 F400K/ F400L/ F400S/ LS990 was rooted. In order to verify whether the procedure worked well, you can check the presence of root access using the SuperSU application, or Root Checker. Hopefully the article of How to Root LG G3 F400K/ F400L/ F400S/ LS990 useful for you.

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