What is the LGUP tool?
LGUP is a program developed by LG Electronics. The LGUP tool allows you to flash the kdz/tot/bin format LG Stock firmware onto your LG android devices. The LGUP software has three versions: LGUP for Store, LG for Lab and LGUP for Developers. LG up for Store is the most popular one.
The current version of the LGUP is Ver. 1.15. It can be used to flash stock firmware onto LG V30, V35, G6, G7 and many other LG devices.
What is KDZ?
KDZ is the format that LG uses when posting official firmware releases on their website. KDZ is all stock releases from LG. Custom ROMs do not come as KDZ. KDZ files are flashed with LG Flash Tool or LGUP.
Where to Get Stock kdz firmware
Most of the LG phones now have stock firmware that comes with KDZ file format. In the U.S. LG does not offer the kdz firmware for LG devices on Sprint, AT&T, Boost Mobile, Tracfone.
For U.S. Consumers, All phones listed here have stock kdz firmware.
Where I can download the LGUP 1.14
How to install the LGUP 1.14
2)Double click the LGUP_Install_Ver_1_14_3.msi to install LGUP 1.14 onto your PC
3)Once the installation is complete, Go the patch folder where you unzip the LGUP-1.14.zip
4)Move the lgup.exe to C:\Program Files (x86)\LG Electronics\LGUP and overwrite the existing files
5)Move the model folder to C:\Program Files (x86)\LG Electronics\LGUP and overwrite the existing files and folders.
6)Run the LGUP.exe to launch the LGUP tool.
Where I can download the LGUP 1.15.
The LG UP 1.15 is not public available.
Understanding the features and functions of LGUP
1) REFURBISH： You will lose all user data（KDZ or TOT）
2) UPGRADE: Keep data and update your phone（KDZ or TOT）
Select Upgrade to flash kdz firmware to unbrick/restore your phone back to stock.
3) Chip Erase: Dangerous, This will erase IMEI/efs, do not try this if you do not have a NV backup.
Chip Erase can also remove the Google FRP on many LG devices with Android 5.0, 6.0. (Such as LG H345, LG MS345)
4)PARTITION DL：Flash the single Partition or selected partitions onto your phone.
This feature can solve “unknown model” issues. This feature can be used to bypass Google FRP by flashing specific tot firmware.
5)DUMP：Dump all partitions of your phone as backup.
Dump the stock firmware from a working phone as back up and use Partition DL to restore phones.
6) FOTA Upgrade: This can be used to flash OTA Update file that comes with dot up file extension.
How to unbrick/restore your phone back to stock with LGUP.
Your phone is soft bricked, and you can still get your phone into download mode.
Download the kdz firmware for your phone.
Download and Install LG UP DLL for your phone or use Uppercut.exe from XDA developer
Now you have everything ready, Run the LGUP software. If LG UP can find your phone, You will see the LGUP main screen. If LG UP cannot find your phone, you need to put your phone into download mode first and run the LGUP again.
Turn off your phone, press and hold the “Volume Up” button and plug in the USB cable from your computer to the phone.
Step 1, From LGUP main screen, Select Upgrade and click Bin file
Step 2, select the kdz firmware for your phone.
Step 3, Click Start to flash the firmware. Once it is 100% completed, Your phone will be restarted and back to life.