Here is our setup. We have CableOne for our internet, and we use a Motorola SB Cable modem which is hooked up into our Airport Express, which is in turn set up to create a wireless network. Recently, we have had issues with periods in time where our iPhones would experience difficulties in surfing the internet, though all lights on the modem and router appeared fine. CableOne has came to check everything out, and it is definitely not the problem, as our computers are still working fine during these periods. Also, the Apple TV seems to have issues in which the home sharing stops, shows nothing connected, despite the fact that the Apple TV and computer running iTunes all show they are on the same network. After a few minutes, the problem goes away, but it does this about 2-3 times a day. Any ideas what the issue may be?