Galaxy S3 Wifi no internet on Comcast/xfinity router Brand new stock Samsung Galaxy S3 will connect to Comcast-provided wireless router (Arris brand), but cannot get out of local network - I can ping other devices on the network, and I can even browse the admin page of the router, but cannot get on the internet.  Other devices work fine. I've tried turning off security.  I don't seem to have the disconnect problems others have reported - the connection is consistent.  Oddly, I don't see the S3 listed in the "connected devices".

If I run ifconfig wlan0, it shows the IP address, netmask but no gateway.
I can set a static IP, but I still am unable to get internet.

I can connect to other wireless networks without problems.

Any ideas?

Yes, other devices can connect - couple of laptops, kindle, wife's phone, my old phone (both androids) and ipad..
Here's what I wound up doing - I reset the router to defaults, and I was able to get conected - I gradually restored everything back to the way I had it (ssid, security etc), and never lost connectivity, so I'm not sure what, if anything is different.