What unroot does to your Samsung Galaxy Core LTE is remove the custom modifications and custom settings and put back all the stock things on the device. That way you will be unrooted and running the official stock ROM on your device.
Unrooting usually solves all the software related issues and gives your device a fresh start. So, here’s how you can go about unrooting your Samsung Galaxy Core LTE:
Files You Need
1. You must have access to a computer running Windows OS in order to do this tutorial.
2. Download and install Samsung USB drivers on your computer, if you haven’t done so yet.
3. Download Stock Firmware for the SM-G386F to your computer. It is the whole operating system for your phone.
4. Download Odin to your computer. It is the tool that allows you to flash the stock ROM on your phone.
5. This should only work on SM-G386F device.
Unrooting the Samsung Galaxy Core LTE
1. Right-click on both Stock Firmware and Odin one by one and select Extract here to extract the compressed files.
2. Launch Odin by double-clicking on its executable file.
3. When Odin launches, click on the button that says PDA and choose Stock Firmware available on your computer.
4. Make sure that Repartition is unchecked in the tool.
5. Checkmark Auto Reboot and F. Reset Time in the tool.
6. Turn off your phone.
7. Turn your device back on in download mode by holding down Volume DOWN, Home, and Power buttons together.
8. Press Volume UP when the prompt appears and you should enter download mode on your phone.
9. Connect your phone to your computer using a USB cable.
10. Hit Start in the Odin and wait for it to install stock firmware on your device.
11. When it’s done installing the firmware, your phone will automatically reboot.
12. You’re done!
You’ll boot up into the stock ROM on your device. Your Samsung Galaxy Core LTE is now unrooted and is running the stock firmware.