The stock LGUP is locked down. It only works with device‑specific DLL files, refuses to flash firmware from a different region (often throwing an “OPID mismatched error”), and hides advanced features such as (the ability to flash individual partitions) and Dump (creating a full backup of the phone’s internal memory) behind a “Store” user role that the tool normally runs under.
: Specific .dll files for your model (e.g., LG V50 or G8) must often be placed in the LGUP installation folder for the device to be detected. lgup 1.16 modified patched