using iPhone 3GS, 32Gb using Linksys WRT54G router using wireless G using WPA-PSK security my home Internet connection is AT&T FastAccess 3.0 Mbps If I go to speedtest.net from my wireless laptop, I get 2.8 Mbps down. If I use the speedtest.net iPhone app over wifi, I get 0.6 Mbps down. This is consistent. My wifi speed is slower than my 3G speed. Is there something wrong with my iPhone?