You can download the from specialized satellite receiver forums and firmware repositories.
: Always backup your current channel list and "Dump" file from the receiver settings before performing a new flash. Download MST 999 MINI 24122020 bin
Because these files are specific to hardware versions and are often hosted on community-driven sites, please ensure you are downloading the version that matches your specific device ID to avoid "bricking" your receiver. Common Sources for MST 999 Firmware You can download the from specialized satellite receiver