Set to Narrow (12.5 kHz) for compliance with modern PMR446 or FCC Part 90 regulations, or Wide (25 kHz) if operating on amateur bands where permitted.
If you are using a cheap programming cable and see an "Error Code 10" in Device Manager, you may need to manually roll back your USB-to-Serial driver to an older version (usually a 2014 or older version of the Prolific driver) that bypasses counterfeit hardware checks.
Once your frequency list is perfect, you "Upload to Radio." In an instant, the silent plastic box is transformed into a precision tool synced with your entire team. Why It Matters Without this software, the BF-T99 Plus
Note the number assigned to your cable (e.g., COM3 or COM4 ). Launch the Baofeng BF-T99 Plus programming software.
Once the progress bar reaches 100%, a "Write Successful" alert will display.