If using an EXE: Run it and follow the prompts. It will detect the "PC UI Interface" port.
The usbloader.bin is a small binary file used during the or "Test Point" method. When a modem has a high-security firmware version that blocks standard updates, this file "bridges" the connection, allowing you to flash older or modified firmware to bypass carrier locks. Essential Tools for the Process e5573s320 usbloaderbin hot
: Always use a "safe" version of the loader, such as the usblsafe.bin hosted on reputable developer sites like GitHub or Hovatek , to prevent permanent IMEI loss. If using an EXE: Run it and follow the prompts