Question:

What specific function can be unable to use when turning on the 'Blocks commands by USB cable' feature?

Answer:

When the 'Blocks Commands by USB Cable' feature is enabled, the USB Debugging Mode becomes unavailable. This means that you cannot connect your device to a computer or charger using a USB cable for certain tasks like transferring files, updating software, or troubleshooting issues. Additionally, the phone's ability to receive commands or data from external devices via USB connection is blocked, providing protection against potential threats from connected equipment, such as malware or unauthorized access.