Please list to me the benfeits of switching my WiFi on to pick up my wireless network as oppossed to just leaving in the defautl 3G mode. This would be very helpful for me. Specifically I am a bit fuzzy on a couple items: Does it make the internet faster when wiFi is enabled? Is it using MORE or less battery power to be left in WiFi connectivity mode? (maybe it uses less battery when surfing the net, but if Im not surfing the net wifi should be off so that both 3G and Wifi are not both draining?) Is there a way to set my phone to automatically connect to certain WiFi networks when the phone recognizes they are available? (i.e., my home wireless network as oppossed to just getting alerts on EVERY available network?) THANKS!!