I need to see what this gateway has accessed. The Arris app for Android is not downloadable as it is not compatible with the latest Android OS. Also, I don't even know if that would solve my problem. I had an ASUS router previously, and accessing the activity history was extremely easy. Not so much it seems with the Arris TG3452A.

Arris supports only the retail products that are available on surfboard.com but not the ISP lease products. 

Please contact your ISP for the same