How to flash LG G7 ThinQ firmware and lock the Bootloader

There are several ways to unlock the bootloader, install TWRP and root the LG G7 ThinQ device. Of course, there are also some custom mods and ROMs that you can try out. However, if you do not like the custom ROMs you have installed and want to go back to the original operating system, we have the guide for you. If you are looking for this guide, we will now see how it is possible to flash the stock firmware on LG G7 ThinQ and then how to re-lock the bootloader.

LG G7 ThinQ is equipped with a Snapdragon 845 processor and a 6.1-inch LCD display with a resolution of 3120 x 1440 pixels. The flagship LG is released with Android 8.0 Oreo and there are 4 GB of RAM and 64 GB of integrated memory. The dual camera on the back is equipped with a 16 MP Super Wide Angle sensor with f/1.9 aperture and the secondary one is always 16MP but with f/1.6 aperture. The front of the device is equipped with an 8 MP f/1.9 sensor with an 80-degree lens. The 3000mAh battery powers the entire configuration.

Warning

Flashing the original firmware does not cancel the warranty of the smartphone if it has not yet expired. However, flashing the stock firmware on your LG G7 ThinQ with the following method will erase all data on the device. So be sure to back up all important data before proceeding.

Requirements

LG G7 ThinQ
A PC
LG USB Driver (download below)
ADB and Fastboot (download below)

Download

LG UP Tool: download from this link: LG UP Tool, LG UP common.dll and Uppercut tool
Stock firmware in KDZ format: G710EM10b_00_0521.kdz
Driver: LG USB Drivers
ADB & Fastboot: if ADB and Fasboot are not installed on your PC, you can follow this guide.

Guide for flashing LG G7 ThinQ firmware

Download the LGUP tool from the previous link and install it on your PC.
Download LGUP_common.rar and extract it, you will receive a file called LGUP_common.dll.
Move the LGUP_common.dll file to C: \ Program Files (x86) \ LG Electronics \ LGUP \ model \ common. Manually create folders if they do not exist. The common folder should probably be created manually. Placing the file in the right place helps LGUP identify the device.
Run the LGUP tool by clicking on UPPERCUT_1.0.0.0.exe you have previously downloaded.
Now you will have to start your LG phone in Download Mode. To do this, first turn off the phone. Now press and hold the Volume up button. Connect the phone to the PC with a USB cable while holding the Volume Up button. If everything is set correctly, LGUP will not warn you, otherwise it will ask you to connect your phone. If this happens you will need to check the USB connection and drivers if they are installed correctly.
Now that your phone starts up in download mode, you will see the firmware update appear at the top right of the screen.
Drag and drop the firmware in KDZ format downloaded in the File Path section of LGUP.
The KDZ file should now be visible in the File Path section. Click the Start button when you’re ready and the flashing process should start. It may take some time, so be patient and do not disconnect the phone during the process. The phone may restart even a few times. When everything is complete, the device will restart normally.

Re-lock the bootloader on LG G7 ThinQ

Go to the ADB folder. Generally, you can find it in C: / platform-tools / or C: \ ProgramData \ Microsoft \ Windows \ Start Menu \ Program Files \ ADB and Fastboot Minimal \ if you installed ADB and Fastboot minimal. Once inside the folder, type cmd in the address bar and press Enter. You can also hold Shift, right click on a blank space and select Open PowerShell window here.
Since you’ve re-installed the stock firmware, you will need to re-enable USB Debugging in the Phone settings.
Once everything is ready, restart the device in bootloader mode with this command: