How to Unroot the LG Optimus F3Q (T-Mobile)
The LG Optimus F3Q is probably one of the last phones I can remember that came with a full keyboard –something I sort of miss from phones nowadays if we’re honest. Besides the possibly outdated (again, I don’t want it to be) hardware keyboard, the device also came with some interesting software by LG.
The UI skin on top of Android that LG put on the device could be taken off and changed rather easily by rooting the Optimus F3Q and flashing a custom ROM, but – if after all of that – you find that you’re done messing around with the software and need to get the phone back to stock, that’s not too difficult either.
Whether you need to unroot the LG Optimus F3Q to send it in for warranty (if you still have one at this point), need to return it to stock so you can sell it to a new user, or just want to get back to the LG firmware it had when it came out of the box to get a new lease on the software life, here’s a step by step tutorial on how to do just that.
I. Before You Begin
1. You should’ve rooted your device using the procedure given here.
2. You need a Windows based PC to do this procedure as the tool that we’re going to use is Windows only.
3. You should have LG USB drivers installed on your PC.
4. You should only try this on the LGD520 model of the device.
How to Unroot the LG Optimus F3Q
We’re going to flash the stock ROM using LG’s own Flash Tool.
II. Downloading Required Files
1. Download LG Flash Tool and save it to your desktop.
2. Download Stock ROM and save it to your desktop.
III. Unrooting the LG Optimus F3Q
1. Turn off your device.
2. Turn your device back on in download mode. To do that, hold down Volume UP and plug in your device to your PC using a USB cable. Your screen should look like the following image:
3. Unzip files from LG Flash Tool over to your desktop by right-clicking on it and selecting Extract here.
4. Double-click on MSXML.msi available on your desktop and let it do its thing.
5. Double-click on KDZ_FW_UPD.exe to launch the flash tool.
6. Select 3GQCT from the Type dropdown menu.
7. Select Emergency from the PhoneMode dropdown menu.
8. Click on the file icon next to KDZ file and select stock ROM .kdz available on your desktop.
9. Click on Launch software update to begin the flash procedure.
10. Wait for the tool to flash stock ROM on your device.
11. When it’s done flashing ROM, reboot your device.
All done, you’re now back to stock and ready to
