MULTI-Module firmware is not the same as the radio firmware, and must be updated separately.
MULTI-Module firmware updates are released regularly and updating the MULTI-Module firmware is quite straightforward.
The latest firmware can be found on the MULTI-Module Downloads site:
The MULTI-Module firmware version can be checked by looking at the Module Status line in the Model Setup menu on the radio.
Module Status showing V18.104.22.168
Keeping your MULTI-Module firmware up to date is strongly recommended, as updates frequently add new features and address issues.
In order to update your MULTI-Module you will need to download the appropriate firmware file and use one of three available methods to write the file to the module.
Step 1: Download the appropriate firmware file for your MULTI-Module
In every release there are many different firmware files, each built for slightly different radio or module configurations. See the Firmware Files page if you need help knowing which file to download.
Step 2: Choose an update method to flash (write) the firmware file to your MULTI-Module