Have a unique issue? Visit the official D-Link Community forums (community.dlink.com) and search for "DWR-M920 firmware thread v.4" for specialized help.
: Includes ETH WAN link-backup via 3G/4G, wireless WDS, and wireless client mode. Updating Firmware D 39-link Dwr-m920 Firmware
If you need to perform an update, follow these general steps based on D-Link update procedures : Have a unique issue