: The engineering serial is reported to work primarily in KPG-111D versions prior to V4.40 . Newer versions of the software may not support the password reset feature even with an engineering key.

: It provides access to a "Password Reset" option under the software's Tools menu, which is hidden in standard installations.

: Connect the radio to your PC using the appropriate programming cable and set the correct COM port in the software.

If you have a compatible version of KPG-111D (V4.40 or older) and an engineering key, you can follow these general steps to reset a radio password:

: Some engineering versions or "lab patches" allow for wideband FM programming on frequencies where standard software might enforce narrowband compliance. Compatibility and Versions