This is the LG UP DLL for T-mobile LG G6 H872 smart phone. The LG UP software need the DLL to detect your phone model number and software version.
A “unknown model” message on LG UP screen means the DLL file for your phone is not properly installed.
Please Just download and install the LG UP DLL for H872 will solve the “Unknown model” issue.
To unbrick/restore T-mobile LG G6 H872 back to stock:
First, You need to download the latest STOCK KDZ firmware for T-mobile LG G6 H872
and then download and install
1) LG USB drivers
2) LG UP software
3) LG UP DLL for LG G6 H872
Now you have everything ready, just put your G6 H827 into download mode and then run the LG UP.
From LG UP main screen, select “Upgrade” process, and click “bin file” to select the kdz firmware file you just downloaded.
Click start to flash the firmware onto your LG G6 H872, wait until it is 100% completed.
Reboot your phone, Now you have your LG G6 back to stock