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LG Optimus 4X HD is the fourth device in the LG Optimus-Android series which carries a quad core processor. It was introduced at the Mobile World Conference earlier this year.

LG Optimus 4X HD

Now, XDA senior member alexp999 has a root method for this device. Now your LG Optimus 4X HD is completely open for you for various kinds of customizations on Android 4.0 ICS.

The root method is a little bit tiresome but is easy. Below are the steps to root LG Optimus 4X HD on Android 4.0 ICS firmware :

  • Download the LG USB Drivers and install them.
  • Download and extract the root kit to “C:\o4xr”
  • Download and copy IS11LG_SystemBackupTest.signed.apk to your device.
  • On the device make sure that Unknown Sources are ticked by going to Settings ->Security.
  • Make sure that USB debugging is enables by going to Settings -> Developer options.
  • Then install IS11LG_SystemBackupTest.signed.apk
  • Open the SystemBackup Test app which you just installed.
  • Choose Power off and restart by holding the power on button.
  • Then you may find the device running slowly, need not worry it is quite normal.
  • Connect the device to your PC via USB cable.
  • Open a command prompt, type cd C:\o4xr and press enter.
  • Then type root and press enter.
  • Wait till the device boots automatically.
  • You should then see the command prompt C:\o4xr>
  • Open up Google Play Store in your device and search for SuperSU.
  • Update SuperSU then open it.
  • Press OK to update the SU binary.
  • You now have root and can safely remove the “SystemBackupTest” app, and restore the “Unknown Sources” and “USB debugging” settings back to how you had them.


If you have any doubt in this root guide, just drop a comment below or visit the original thread at XDA.

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