This guide refers to a Netcomm NB6PLUS4W router, but will apply to most Netncomm routers in general.
1. Visit the router's IP address in a new browser window.
The "Enter Network Password" window will appear. By default, the username is “admin” and the password is also “admin."
Click the OK button.
Go to “DNS Server” under the “Internet” section and uncheck the box titled “Enable Automatic Assigned DNS.”
Please write down your current DNS settings before switching to OpenDNS, in case you want to return to your old settings for any reason.
Change the Primary and Secondary DNS settings to:
Proceed to the “Management” tab and then to “Reset Router” in the sidebar.
Ensure that "Reset to factory default settings" is NOT ticked.