How to Unroot the LG Optimus F3 (MetroPCS)

Perhaps you’re done playing with root and custom ROMs on your Android device? Regardless of the reason, it’s usually pretty easy to unroot your device and go back to the stock firmware.

Some of the reasons for unrooting your LG Optimus F3 (MetroPCS) are:

• Sending in the device for warranty (most, but not all unrooting procedures reinstate the manufacturer warranty if you had one before rooting).
• Starting over (simply undoing everything you did while rooted so you can have a clean slate to start over).
• Fix any issues (Maybe rooting messed something up? No problem, unrooting will take care of it for you).

Ready to get started? Here’s how to unroot the LG Optimus F3 (MetroPCS):

I. Before You Begin

1. You should have rooted your device using the procedure given here.

2. This procedure only works on Windows based PCs.

3. You should have required drivers installed on your PC. If you don’t, you can download them from here.

II. Downloading Required Files

1. Download Flashing Tool and save it to your Desktop.

Flashing Tool (Download link’s given in the first post)

2. Download the appropriate KDZ Stock Firmware for your device and save it to your Desktop.

Stock Firmware (Download link’s available in the first post)

III. Unrooting the LG Optimus F3 (MetroPCS)

1. Extract files from Flashing Tool by right-clicking on it and selecting Extract here.

2. Double-click on KDZ_FW_UPD.exe and it’ll open.

3. Select 3GQCT from the Type dropdown menu.

4. Select Emergency from the Phonemode dropdown menu.

5. Click on folder icon and choose the KDZ Stock Firmware you downloaded earlier to your Desktop.

6. Turn OFF your device.

7. Hold down Volume UP and plug in your device to your PC via USB cable.

8. Your device should boot into Emergency mode.

9. Hit Launch software update in the Flashing Tool and it should start flashing the stock firmware on your device.

10. Once the firmware has been flashed, reboot your device.

11. You’re all done!

All set! You are now running stock firmware on your LG Optimus F3 (MetroPCS) and have unrooted it.

Want to try again? You can always reroot your device by heading to our Rooting How To’s section, finding your device, and doing the How to Root listed for it there.