Yes, the iPhone 3G has Wi Fi.
3G is the service for things like the internet... just like in the old iphone there is Edge.
You get faster internet then the original iPhone.
iPhone 3g is capable of 3g access, but not iPhone 1st generation. However, some areas do not have 3g coverage, so iPhone will automatically switch to EDGE. iPhone 1st generation only has EDGE and Wifi, and iPhone 3g has EDGE, 3g, and WIFI.
It has always had internet. Edge now 3G or WiFi.
The iPhone 2G does not have the hardware to capture a 3G signal. It does not matter where you are.
The only way is to buy a white coloured case.
Yes
if you are using something that requires it then yes it does use internet
iPhones contain internet with 3G data roaming. Many other devices contain it, however iPhones have been claimed as best for it. The 3G iphone is the first to announce 3G.
No. It can use your 3g
3G has better memory and faster internet. The higher the G the better. This is reffering to an Iphone.