I have had similar issues to those mentioned above, but I think I have more information to share that might help find a solution. I tried changing security settings as mentioned but saw no change in the ability of my wireless devices to connect to the network. There is one thing I have noticed on this device itself. It seems to have a really difficult time functioning as a DHCP server! I noticed this over the wired connection as well. It should only take a DCHP server fractions of a second to assign a new IP address. However, whenever I try to renew an address manually (ipconfig /renew), it fails miserably. Give it 10 to 30 minutes and the device eventually registers. I've noticed the same kind of errors on the wireless connection. I'm able to see the network on various devices and log into them using the SSID/password combination, but they hang on the part where they're acquiring an IP address. As wireless devices, they give up on this within a minute or two. I have successfully connected my devices once, shortly after doing a modem reset, but the problem returned about half an hour later. I've try numerous types of resets with no new success. I have managed to keep my wired devices connected by manually assigning IP addresses to them, but most wireless devices (particularly phones and tablets) don't offer the option of manually assigning an address on a wireless connection. I don't know if this information helps anyone, but since I've found no solution and am tired of getting jerked around by Comcast Customer (dis)Service, maybe someone here can use this to find a solution.
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