The LG UP DLL for LG US550 ( LGUP_US550.msi) is used by LG UP to detect your phone’s current software version, Model number and etc.
To unbrick/restore LG Logos US550 back to stock with LG UP, You need:
How to use LG UP:
Now connect your Phone to PC Via USB Cable and Run the LG UP Software
Wait until LG UP detect your Phone. If LG UP screen shows up, Go Step 2.
If LG UP can’t find your device, you need to put your phone into download mode manually by
Turn off your phone, press and hold “Volume Up” button and plug-in the USB cable from your computer to the phone.
Now Run the LG UP, waiting for LG UP install necessary USB drivers for your Phone.
When LG UP screen shows up. Go Step 6
Step 2, From LG UP Screen, click on the Upgrade process option
Click Bin File and Select the LG us550 firmware that you have downloaded
Now simply click on the Start button to begin the flashing process. Wait for few minutes until the installing process completes.
Welcome back, Now, Your phone is back to Stock. If you experience issues, please let us know in the comments below.