You can buy the iphone from apple & put it on whatever network you want to, but you cannot buy it from a phone network & change the network.
The iPhone 3G is capable of accessing a 3G network. Some of the older iPhones and the new iPhone 4 can not access a 3G network, however. There are many droid that have the same applications as the iPhone but that will hook up to the 3G network.
yes, but you have to have swag also.
Yes you can but you will not get the benefit of the 3G network speed, you will only get EDGE. Also this will require an iPhone data plan change and if you had the unlimited plan on the iPhone 3Gs you will lose it and you will not be able to get it back.
How much does an iphone 3G cost without network in the UK?
If you have wifi
The iPhone 4 is better than the iPhone 3g. It has the capability of operating on a 4g network, which eliminates the problems you've been having with the slowness of the 3g model.
Yes, just go in the network settings and turn off Enable 3G.
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.
Either Edge (E) or 3G.
As long as you have a connection to a network(Edge, 3G, Wi-Fi) and that network is connected to the internet, yes, it is always online.
An iPhone 4g has better technology. It also includes SIRI, who answers all questions. Furthermore, the iPhone 4 has the capability to operate on the 4g network, whereas the iPhone 3g does not.
The only difference is the network that it runs. The 2G iPhone is slower when you are browsing the internet, while the 3G has a faster network. Also, the iPhone 3G has more of a 'slimmer' feel to it, though technically slightly thicker. Other than that, there is no major differences, and they both run the same software.