As another commenter noted, it's possible to get this functionality on iPhone if you jailbreak and purchase a tethering app. There are apps that will let you ru

As another commenter noted, it's possible to get this functionality on iPhone if you jailbreak and purchase a tethering app. There are apps that will let you run a wifi hotspot, but I personally just spent a few bucks on an app which would allow me to use the iPhone's native tethering, which is very nice, automatic, etc.