Has anyone else experienced severe WiFi problems with the iPhone? Most of the time unless I am standing right next to the wireless router, the wifi signal will show up on the iPhone as an available network but only show 1 bar. When I try to connect it says "Unable to Connect." If I go stand within a few feet of the router I can usually get it to connect (after multiple tries.) I have experienced this with most WiFi connections however, the iPhone seems to see the WiFi signal in my office as strong, and it always connects the first time, even though the network is password protected and the router is far away from where I connect. I am very confused. Is anyone else experiencing similar WiFi problems? Any ideas on what causes it or how to fix it?