Hello!
I dont understand your question very well... But perhaps,I could help you though....
You will have WiFi on your iPhone.
To get started,I think you should go to AT&T office,and tell them,that you want an iPhone.... And they will tell you what to do.
Maybe,they could upgrade your contract.
Maybe,you will be forced to close your current one and open another....
But,I think you wont find an iPhone in Apple Stores.
Apple Says NO MORE IPHONES
And read-
3g iPhone to be Released Second Half of June
Hope,this will help,if you have more questions,fell free to ask!