I've experienced a loss of data connectivity a couple of times with my new 3G S. The phone will show 3G and full bars, yet I get no network/data access. Just spinning load icons or error messages in apps that require connectivity. Rebooting the phone solved the problem. I'm also losing connectivity with my home wifi network - or the phone fails to auto connect to my home wifi network. I never had these problems with my old 2G iPhone. Any thoughts?