My 3GS will lose the wifi signal and when I go to reconnect it tells me that it cannot join the.network. I've tried to turnoff the wifi on settings and turn it back on, but that does not work. I have to go to my hub and unplug and plug to get the phone to find it. I drop connections at work also, but I can't unplug that. Is there a way to get this connection back in another way?