Comcast Xfinity and Android wireless

I recently switched from Verizon DSL to Comcast Xfinity. I've only had Comcast about 3 weeks and I'm having trouble keeping my Android devices connected. Now both my phone and my tablet show a connection but no internet. My win7 laptop works fine. Can anyone help trouble shoot this problem? I've tried everything I know to restore these connections.


Android Expert
I have Comcast and have never had this issue. However I did have a faulty router that I had to reboot every once in awhile to get my wifi working.