Since an app with root permission can read other apps data, an app can access the entire system. That’s different from apps running on a smartphone or tablet that don’t have any root access. Without root access these apps are locked down and restricted to the apps own data, but not any other apps data. That means when malware comes in the form of apps, it makes your device more vulnerable with root access. If you are someone who does a lot of banking by using apps, you might want to think twice about having root access if you don’t know how to spot malware easily.


The Files You Need

  • Download the Sprint LG G4 stock ROM from this page.
  • Download the LG Flash Tool for flashing firmware for your device from this page.
  • The following guide is only made for use with the Sprint variant of the G4. Do not flash this file on any other device.
  • You can only use this guide with a Windows PC.

Unrooting The LG G4

  1. Unzip the Flash Tool for your computer.
  2. Double-click and run the Flash Tool on the PC.
  3. Unzip the Sprint stock ROM on the desktop. Click and drag that stock ROM over to the desktop.
  4. Long-press the Power button on the G4 and make sure it’s off.
  5. Reboot the G4 holding the Volume Up key when connecting the smartphone to the computer. It should result in the G4 being in download mode and ready to use the Flash Tool.
  6. Select GSM from the ‘Select Type’ menu.
  7. Select ‘DIAH’ from the PhoneMenu.
  8. Click the ‘Select KDZ file’ and upload the Sprint stock ROM from the desktop.
  9. Click the CSE Flash button.
  10. Click the Start button.
  11. Click the ‘OK’ button and the Flash Tool will now flash the firmware file on your device.
  12. Skip the part where it tells you to add your country and region. The file will flash when you upload it correctly.

Good; your LG G4 now has the stock ROM back on the device just like it was out of the box. You have no more security concerns and you can send it away for free repairs under warranty.