my customer-own modem appears to lose its provisioning/activation at least once a day, and that is for all of my devices, which get routed to the Xfinity "Let's get started" screen at "https://register.be.xfinity.com/activate". you could effectively say that my modem is stuck in "ground-hog mode".
other Comcast Xfinity customers also appear to have this same problem which has been reported here: "http://forums.xfinity.com/t5/Your-Home-Network/Modem-loses-provisioning-asks-for-reactivation-every-...", and here: "http://forums.xfinity.com/t5/Your-Home-Network/Xfinity-activation-is-required-every-day/td-p/3059193" although i have no idea if the issue has been resolved for them.
Hi willielassiter. I can assist in reviewing your account and modem provisioning, in order to help troubleshoot your recurring activation issue. Please send me a private message and include your full name, service address, and account number so I can access your account.
Remember, this is for YOUR convenience, as you might not be recieving the best possible speed.
FWIW, the OP didn't mention the particular make and model number of their modem.