Exact same thing for me. Xfinity claims my Netgear Router Modem is an "approved" device but ever time a changed signal gets sent (every 6 months) I have no internet. It trips the router protections. Only resolution is to hard-reset my Netgear Nighthawk. I call BS that for such an expensive device, I NEED to hard reset it. Boy oh boy though both Xfinity and Netgear claim its not on their end. But will happily offer me a tech will come out for $100 OR get "additional phone support" from Netgear for $133. For what?! To be told I have to hard reset the device. WTH! Bottom line, don't buy Netgear if you have Comcast / Xfinity. Seriously!
