Yes
no you can use the mobile network for Internet
You get faster internet then the original iPhone.
does the iphone 3 have to have internet to work.
No defiantly not. Apple will release the iPhone 5 in black and white. Maybe an internet shop would change the parts though.
Yes, it costs extra for the internet on the iphone.
The iPhone has its own Service Plan which has Internet included.
yes, you can just use wifi access to use the Internet on your iPhone
ipad iphone two totally different things Iphone is Smaller and its a phone Ipad, is your internet browser gaming device without the phone.
for an iphone there's already an app called safari which is the internet
Yes, you can buy international iPhone's version (a iPhone with out Internet) in eBay or amazon, some iPhone that sell outside U.S, is international iPhone' version. You can use it with any network that you like.
No, if you get an iPhone, you either connect with wi-fi or you use data. Both are Internet. Data you pay for monthly with the phone, wi-fi is like free Internet. If you don't want to pay for the monthly charges that comes with getting an iPhone, definitu look into getting an iPod Touch. An iPod Touch is basically the same as an iPhone, minus the phone and the monthly charges...