If you are looking for best tutorial to unroot your LG Optimus L3 E400 smartphone, you are landing at the right page.
Unrooting wipes off everything you put into your phone and then replaces it with the official/stock firmware.
Before you begin:
1.Make sure you have rooted your phone, in case if you are not sure about the same just download the Root Checker app from Google Play Store and confirm your device status.
2.If it is rooted, next thing all you need to do is to backup your phone using backup applications.
3.After that ensure about the battery percentage level of your LG Optimus L3 E400 smartphone, it helps to avoid the power issues while unrooting the device.
4.Next enable the UBS debugging option on your phone by following the path Settings > Applications > Development > USB debugging. Otherwise, you won’t transfer any files between your computer and mobile.
5.Then turn ON the Unknown sources option as well from the Menu > Settings > Security > Unknown sources.
Disclaimer : Proceed the given below procedure at your own risk. I would not be held responsible for any damage that occur to your phone.
Procedure to unroot LG Optimus L3 E400 Smartphone:
1.First download the APK file from this page. (download link available at this page in the LG Devices list under this topic).
2.Once you have downloaded the file, just place them in your desktop.
3.After that connect your phone to the computer using USB cable.
4.Copy the downloaded APK file to the root of your SD card.
5.Once you have copied the file, just disconnect the device from the computer.
6.After that make sure the USB debugging option and Unknown sources are turned ON and open the file manager on your phone and tap on the APK file to install it.
7.Once it is installed, just launch it from the menu.
8.Tap unroot button in the app, and the unrooting process will begin in your phone and it will take few minutes to complete the process. So, wait for few minutes.
9.Once the process has been completed, reboot your phone.
Now, all the SU binaries have been removed from your LG Optimus L3 E400 smartphone. Now, it will be original as when you took it out of the box.