The LG Optimus 4X HD started booming in the markets as soon as it arrived and why it shouldn’t do, it’s got a 1.5GHz Quad-core processor
that provides far better performance than those dual-core ones and
there’s 1GB of RAM equipped in the device. On the software-side, the
device runs on the Android Ice Cream Sandwich, a bit older if you’ve seen Jelly Bean running on the devices. The device in talk is rootable, all thanks to the XDA Developers.
A rooted device provides more options and features than what you find
in an unrooted one and if you’re ready to root your LG Optimus 4X HD
smartphone, then jump onto the guide below.
I. Before You Begin:
1. This will void the warranty of the
device. However, you can reinstate the warranty by unrooting the device
if there’s any unrooting procedure available.
2. The following procedure works on Windows based PCs only.
II. Downloading Required Files:
1. SystemBackupTest APK (It’s attached in the first post)
2. o4xr (It’s attached in the first post)
3. LG United Drivers (It’s attached in the first post)
III. Rooting the LG Optimus 4X HD:
1. Place all three files you downloaded to your Desktop.
2. Extract files from 04xr as well as Drivers archive to your Desktop.
3. Install Drivers using the files you extracted from the archive.
4. Connect your device to your PC via USB cable.
5. Copy the APK file you downloaded over to the root of your SD card.
6. Once file’s copied, disconnect the device from your PC.
7. On your device, head to Menu>>Settings>>Security and enable the Unknown sources option.
8. Enable the USB debugging function as well by heading to Menu>>Settings>>Developer options>>USB debugging.
9. Open the File Manager on your device and tap on the APK file and install it.
10. Once installed, launch it from Menu.
11. While the app’s running, hold down the Power button and choose the Reboot option.
12. The device should stuck in bootloop. It’s normal and just move to the next step.
13. Connect the device to your PC via USB cable.
14. Open a Command Prompt Window on your Desktop where root files are located. To do so, press and hold the Shift button on your keyboard and right-click on any empty area on the screen, then choose Open command window here.
15. Type in following command into the Command Prompt Window:
root
16. Wait till it roots the device.
17. Once rooted, the device should boot into Normal mode.
18. Launch Google Play and search for the SuperSU app.
19. Hit Update button and the app will be updated.
20. Launch the SuperSU app on your device and it should ask you to update binaries, hit Yes.
21. You’re all done!



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