First you have to identify the software version you are currently using on your Ariss router. For this, you must type 192.168.0.1 in the URL section. This would allow you to log into your Arris router. Then follow the steps to update Arris router firmware.
Steps to update firmware:
Go to the download section and download the most recent version of the firmware.
It is important as the firmware update should be compatible with the Arris router model you are currently using.
Return to the web interface and follow the step- by- step process to complete Arris router update firmware.
Now, locate the edit option. You can select the image you wish to upgrade.
The last step is rebooting of Arris router and Arris firmware update is complete.