The advanced user community has looked into custom firmware for the DWR-M920 because it shares hardware with several other routers. Warning: This voids your warranty and risks permanent damage.
To update the firmware for your D-Link DWR-M920 4G LTE Router Dwr-m920 Firmware
I couldn’t find any official or reliable guide for in my current knowledge base. It’s possible that: The advanced user community has looked into custom
Firmware acts as the operating system for your router. Regularly updating the is necessary to: Dwr-m920 Firmware