What internet services does the iphone accept?
can you use your cox internet connection if you already have the internet or do you have to get at&t or sprint?
Your question is very important for which I think you should go online and check this out: http://look4iphone.com/articles
Enjoy 
Your question is very important for which I think you should go online and check this out: http://look4iphone.com/articles
Enjoy
References :
The iPhone accepts any Wi-Fi. It will accept ONLY AT&T’s 3G, EDGE, and GPRS. Cox Internet will absolutely work.
References :
I have Cox Internet.