: If any part is missing or has a different file size than intended, the extraction will fail. 2. Extract the Firmware File
You do not extract each part individually. Instead, you extract them as a single volume. Install a compatible archive tool like WinRAR or 7-Zip . Download IRIS 55E6710 Firmware part04 rar
: Continue holding the button until the "Software Upgrading" or "System Recovering" progress bar appears on the screen. : If any part is missing or has