I have a 3G iphone with ios 4 and it didn't work on it
Yes. if its Iphone 3G, then you should be supported by Softbank or Docomo 3G Iphone 2, dont work..
yes
There is a small chance you have no enabled 3G. To do this follow these steps. Go to Settings > General > Network and Enable 3G should be set to on. Also your area may not have 3G capabilities. In this case there is no 3G signal for 3G to work. To check 3G coverage contact your provider. Also if your iPhone is a 1st Generation and not the iPhone 3G you do not have 3G capabilities.
yes, but you have to have swag also.
it just wont work
it just wont work
yeah
If you have wifi
iPhone 3G S = iPhone 3G + Extra's
Multitasking does not work on a iPhone 3G, You must Jailbreak your Phone to do that (Beaware that your phone would be very slow with Multitasking)
The iphone 3g is the third generation iphone , is that what you are asking