My S2's WiFi would grey-out a lot and I would reset my cable modem.
Problem solved, everybody's happy. Yeah - right.
I have both WiFi and wireless TV in my house. After one more problem
with the TV, I was talking with my Cable Guy who swore (and will swear)
that my Cisco Router does NOT have to be plugged into my Cable Modem
to get WiFi to my wife's Apple or our BBs or our TVs. Yeah, right. Turns
out that my cable modem does NOT work its wireless magic UNLESS
it is plugged into my Cisco router, irrespective of whether or not my
non-wireless Cisco Router has hardwired outputs to my computers
connected or not.
Duh. Don't know if it is a loading issue or a TCP/IP address issue.
Suppose I had tone in the sense that my S2's WiFi icon was white. Then if
I would unplug the Cisco router, it would stay white. But: if I were to then
disable WiFi on my S2 and re-enable it, it would grey out and stay that way.
If I were to then turn off my 3G, I could not surf with WiFi. More Duh.
Oh well ! Just keep the &^%##(%$ Cisco router plugged in.
Doctor Neutron